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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Putting the driver in the hull is certainly feasible and has appeal but that requires a change in our spec and Cliff needs to wade into this.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>That’s why we wrote the spec. not as a cast in concrete but what most of the PSubs wanted (maybe).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Bear in mind the driver will still need a small heat sink to dissipate about 11 or 12 watts and that makes the light into two parts.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>We certainly need the LEDs to be cooled by the water.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Ken<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>Alan James via Personal_Submersibles<br><b>Sent:</b> Wednesday, September 02, 2015 6:07 PM<br><b>To:</b> Personal Submersibles General Discussion <personal_submersibles@psubs.org><br><b>Subject:</b> Re: [PSUBS-MAILIST] Light lense<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id="yui_3_16_0_1_1441230333437_8980"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Ken,<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8978"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>it may be worth looking at whether we design this light with the driver in the hull.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8971"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I have covered this in another email, but additionally, the commercial standing<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8970"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>lamp I saw, that was using the latest 100W LED array had alluminium heat sinks<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8970"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>about 3" long & about 10 of them, out the back. So heat will be a big problem.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8970"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>If we keep the driver in the hull it won't get cooked, & we can heat sink the emitter<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8970"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>straight to the back of the housing where it will be cooled by water.<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8970"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Alan<o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8970"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p><div id="yui_3_16_0_1_1441230333437_8676"><div id="yui_3_16_0_1_1441230333437_8675"><div id="yui_3_16_0_1_1441230333437_8694"><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='background:white'><b id="yui_3_16_0_1_1441230333437_8968"><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:black'> Ken Martindale via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br><b>To:</b> 'Personal Submersibles General Discussion' <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br><b>Sent:</b> Thursday, September 3, 2015 9:54 AM<br><b>Subject:</b> Re: [PSUBS-MAILIST] Light lense</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8674"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p><div id=yiv7752138914><div id="yui_3_16_0_1_1441230333437_8673"><div id="yui_3_16_0_1_1441230333437_8672"><div id="yui_3_16_0_1_1441230333437_8935"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'>Alan,</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8700"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'>Usually if the driver is a true current source the extra wire doesn’t make much difference (within reason).</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8671"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8678"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'>Also most drivers filter the switching waveform so the current to the LED is mostly a dc tern with a very low AC component.</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8957"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'>Take a look at the design we have on the forum tomorrow late to see what the present design is.</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_9517"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'>Ken</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8933"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8917"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8918"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8919"><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><o:p> </o:p></span></p></div><div id=yiv7752138914yqt61229><div id="yui_3_16_0_1_1441230333437_8704"><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in' id="yui_3_16_0_1_1441230333437_8703"><div id="yui_3_16_0_1_1441230333437_8702"><p class=MsoNormal style='background:white'><b><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'>From:</span></b><span style='font-size:11.0pt;font-family:"Helvetica",sans-serif;color:black'> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b id="yui_3_16_0_1_1441230333437_8920">On Behalf Of </b>Alan via Personal_Submersibles<br><b id="yui_3_16_0_1_1441230333437_9520">Sent:</b> Monday, August 31, 2015 8:49 PM<br><b>To:</b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br><b id="yui_3_16_0_1_1441230333437_8932">Subject:</b> Re: [PSUBS-MAILIST] Light lense</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div></div><div id="yui_3_16_0_1_1441230333437_8921"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div id="yui_3_16_0_1_1441230333437_8931"><div id="yui_3_16_0_1_1441230333437_8930"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Hank, that's a good question for Ken.<o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_8923"><div id="yui_3_16_0_1_1441230333437_8922"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>As I understand it, the LED drivers have a switching frequency so are turning on & off<o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_8929"><div id="yui_3_16_0_1_1441230333437_8928"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>the power to the LED. When electricity runs through wire it creates a magnetic field &<o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_8925"><div id="yui_3_16_0_1_1441230333437_8924"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>when the power is switched off, the magnetic field collapses & causes a surge of electricity.<o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_8927"><div id="yui_3_16_0_1_1441230333437_8926"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Like a coil in a car creating a spark across a spark plug. The LED doesn't like this. <o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_9522"><div id="yui_3_16_0_1_1441230333437_9521"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>The longer the run of wire, the more inductance is created. The capacitor is a buffer for this<o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_9524"><div id="yui_3_16_0_1_1441230333437_9523"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>& there are big ones on high power LED drivers. They are there to combat the inductance from <o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_8959"><div id="yui_3_16_0_1_1441230333437_8958"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>the battery to the driver, but by lengthening the wiring from driver to LED you create the <o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_8956"><div id="yui_3_16_0_1_1441230333437_8955"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>problem out the other side. Perhaps a capacitor could be placed in the light fitting, & the<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>driver in the pressure hull. This would reduce the footprint inside the fitting & stop the rest of the electronics from being exposed to any heat build up. you would still have the problem<o:p></o:p></span></p></div></div><div id="yui_3_16_0_1_1441230333437_8706"><div id="yui_3_16_0_1_1441230333437_8705"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>of pressure on the capacitor if you compensated though. Have seen pressure resistant<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>capacitors, but don't know enough about them.<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I will go & see a friend who is an expert on this.<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Alan<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>Sent from my iPad<o:p></o:p></span></p></div></div><div><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>On 1/09/2015, at 11:20 am, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p></div></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><div id="yiv7752138914yui_3_16_0_1_1441063212688_3129"><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>Alan,v</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441063212688_3129"><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>Why can't the driver stay inside the submarine, why put it in the housing?</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441063212688_3129"><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>Hank</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div><div><div><div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'>On Monday, August 31, 2015 4:55 PM, Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div><div id=yiv7752138914><div><div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Hank,<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>you have got me thinking. I don't want to pressure compensate because of the capacitors<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>in the driver. I was also concerned that any fluid might yellow with the heat.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>According to this article, the main problem with LED lights is disipating the heat that comes<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>out the back of the emmitter.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><a href="http://www.deepsea.com/wp-content/uploads/article-Application-of-High-Power-LEDs-UI08.pdf" target="_blank">http://www.deepsea.com/wp-content/uploads/article-Application-of-High-Power-LEDs-UI08.pdf</a><o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I could seal off the driver compartment at the back of the emmitter & fill that with oil. However<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I will be machining this out of alluminium rod & can keep the enclosure round the driver pretty small<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>so there isn't much of an air gap to the housing.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Could easily experiment with & without oil to see if it makes much difference.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Alan<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14459"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14407"><div id="yiv7752138914yui_3_16_0_1_1441057154792_14406"><div id=yiv7752138914yqt70729><div id="yiv7752138914yui_3_16_0_1_1441057154792_14405"><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><hr size=1 width="100%" align=center></span></div><div><p class=MsoNormal style='background:white'><b id="yiv7752138914yui_3_16_0_1_1441057154792_18510"><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'> hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br><b id="yiv7752138914yui_3_16_0_1_1441057154792_18508">To:</b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> <br><b>Sent:</b> Tuesday, September 1, 2015 10:09 AM<br><b>Subject:</b> Re: [PSUBS-MAILIST] Light lense</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14408"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div id=yiv7752138914><div id="yiv7752138914yui_3_16_0_1_1441057154792_14424"><div id="yiv7752138914yui_3_16_0_1_1441057154792_14423"><div id="yiv7752138914yui_3_16_0_1_1441058852894_3152"><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>Alan,</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441058852894_3152"><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>I assume your going with a pressure housing? why not fill the pressure housing 95% full of oil to tsf the heat to the water?</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441058852894_3152"><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'>Hank</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14446"><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica",sans-serif;color:black'> </span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14429"><div id="yiv7752138914yui_3_16_0_1_1441057154792_14428"><div id="yiv7752138914yui_3_16_0_1_1441057154792_14427"><div><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div><div id=yiv7752138914yqt01305><div id="yiv7752138914yui_3_16_0_1_1441057154792_14426"><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:black'>On Monday, August 31, 2015 4:00 PM, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:</span><span style='font-family:"Helvetica",sans-serif;color:black'><o:p></o:p></span></p></div></div><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14432"><div id=yiv7752138914><div id="yiv7752138914yui_3_16_0_1_1441057154792_14431"><div id="yiv7752138914yui_3_16_0_1_1441057154792_14448"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Sorry part 2 ( ipad & big fingers)<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14430"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>The LED cost $11- & the driver $6-. Free delivery.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14433"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I have ordered a number of reflectors for a couple of dollars each.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14434"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>The driver is quite small. With the automated assembly processes<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14435"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>& micro sized components, you can't get anywhere near this size<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14436"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>soldering on the components yourself.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14478"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Because of the heat factor I am limiting myself to the 6000lm LED.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14437"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Will be looking at the beam angle I get from these reflectors & available glass <o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14438"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>lenses, before making up a housing. Looking for a borosilicate lense<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14444"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>because of the heat transfer & low expansion.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14439"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I have taken a different route from Ken, but this process he started has<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14449"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>been very helpful & motivating, as has been the discussion & information<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14440"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>that has come out. <o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14443"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Alan<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14441"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br><br>Sent from my iPad<o:p></o:p></span></p></div></div><div id=yiv7752138914yqt41182><div id="yiv7752138914yui_3_16_0_1_1441057154792_14442"><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>On 1/09/2015, at 9:42 am, Alan <<a href="mailto:alanlindsayjames@yahoo.com" target="_blank" id="yiv7752138914yui_3_16_0_1_1441057154792_17450">alanlindsayjames@yahoo.com</a>> wrote:<o:p></o:p></span></p></div></div></div></div><div id=yiv7752138914yqt87757><div id="yiv7752138914yui_3_16_0_1_1441057154792_14451"><div id="yiv7752138914yui_3_16_0_1_1441057154792_14450"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>I bought a 24-36V 6000 lm & 4000 lm LED array along with drivers, <o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14452"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>& have another lot in the post.<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14453"><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>The driv<br><br>Sent from my iPad<o:p></o:p></span></p></div></div><div id="yiv7752138914yui_3_16_0_1_1441057154792_14454"><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>On 1/09/2015, at 4:09 am, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p></div></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Ken is in Ireland on a holiday but before he left, he had finished the design of the LED Driver power stage. Still working on the housing but have been sidetracked the last month on getting my boat ready to dive after major upgraded over the last 18 months. Hope to get back on the Light housing shortly. I did dive the new 5K LED light this weekend and it worked great.<o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>Cliff<o:p></o:p></span></p></div></div></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>On Mon, Aug 31, 2015 at 8:09 AM, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'><br>What has happened with the light build?<br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></blockquote></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div></div></blockquote><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></div></blockquote></div></div></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div id=yiv7752138914yqt00029><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></div><div style='margin-bottom:12.0pt'><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div></div></div></div></div></div></div></div></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'> <o:p></o:p></span></p></div><div id=yiv7752138914yqt76460><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica",sans-serif;color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" 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