<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_1_1438023673532_36610"><span>David,</span></div><div id="yui_3_16_0_1_1438023673532_36611" dir="ltr"><span id="yui_3_16_0_1_1438023673532_39605">do you have some sort of thermostat in the driver or are you that makes it blink.</span></div><div id="yui_3_16_0_1_1438023673532_36611" dir="ltr"><span id="yui_3_16_0_1_1438023673532_39787">or are you simply using resistors? </span></div><div id="yui_3_16_0_1_1438023673532_36611" dir="ltr"><span id="yui_3_16_0_1_1438023673532_39759">Here is the link to the Newtsun, it doesn't say in the specs that it is oil filled</span></div><div id="yui_3_16_0_1_1438023673532_36611" dir="ltr"><span id="yui_3_16_0_1_1438023673532_39682">but I remember being told that & it's design indicates that.</span></div><div id="yui_3_16_0_1_1438023673532_36611" dir="ltr"><span id="yui_3_16_0_1_1438023673532_39686"><a href="http://nuytco.com/products/newtsun-100/" id="yui_3_16_0_1_1438023673532_39684">http://nuytco.com/products/newtsun-100/</a><br></span></div><div id="yui_3_16_0_1_1438023673532_36611" dir="ltr">Alan</div><br> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1438023673532_39574"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1438023673532_39573"> <div dir="ltr" id="yui_3_16_0_1_1438023673532_39602"> <hr size="1" id="yui_3_16_0_1_1438023673532_39604"> <font size="2" face="Arial" id="yui_3_16_0_1_1438023673532_39603"> <b><span style="font-weight:bold;">From:</span></b> David Colombo via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Tuesday, July 28, 2015 7:33 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] LED Lights<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1438023673532_39572"><br><div id="yiv1168655652"><div id="yui_3_16_0_1_1438023673532_39571"><div dir="ltr" id="yui_3_16_0_1_1438023673532_39601">Hi Alan, one thing that I have observed so far is that without a heat sink, the led will heat up in about 15 seconds and then start to flash on and off. </div>
<br clear="none"><div class="yiv1168655652gmail_quote" id="yui_3_16_0_1_1438023673532_39570"><div class="qtdSeparateBR"><br><br></div><div class="yiv1168655652yqt4115344589" id="yiv1168655652yqtfd22425"><div dir="ltr" id="yui_3_16_0_1_1438023673532_39600">On Mon, Jul 27, 2015, 12:29 PM Alan James via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></div><blockquote class="yiv1168655652gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;" id="yui_3_16_0_1_1438023673532_39569"><div id="yui_3_16_0_1_1438023673532_39568"><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_1_1438023673532_39567"><div id="yui_3_16_0_1_1438023673532_39599"><span id="yui_3_16_0_1_1438023673532_39790">Hi David,</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39598"><span id="yui_3_16_0_1_1438023673532_39597">you can get really simple with these LEDs & run the emitter straight from</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39596"><span id="yui_3_16_0_1_1438023673532_39595">the power source. The light intensity fluctuates with the heat, but with the</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39594"><span id="yui_3_16_0_1_1438023673532_39593">light intensity we are talking about, it might not be noticable. The trick would</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39592"><span id="yui_3_16_0_1_1438023673532_39591">be picking a voltage low enough so that it didn't get too bright & burn out the </span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39590"><span id="yui_3_16_0_1_1438023673532_39791">emitter when it </span>warmed up. </div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39589"><span id="yui_3_16_0_1_1438023673532_39588">Next step up in simplicity is to just stick a resistor in series, & there are</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39587"><span id="yui_3_16_0_1_1438023673532_39586">calculators for this on line. I am wondering if a thermister instead of a resister</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39585"><span id="yui_3_16_0_1_1438023673532_39584">would be a good idea, as this would restrict the current as the unit heated up.</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39583"><span id="yui_3_16_0_1_1438023673532_39582">It may be a good option for running out of water if the thermister values were right.</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39581"><span id="yui_3_16_0_1_1438023673532_39580">The beauty of this system would be that you would only have 2 components</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39579"><span id="yui_3_16_0_1_1438023673532_39578">that you could damage by heating. The down side is a reduction in efficiency</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39577"><span id="yui_3_16_0_1_1438023673532_39576">over a buck driver type system.</span></div><div dir="ltr" id="yui_3_16_0_1_1438023673532_39575"><span>Cheers Alan</span></div><br clear="none"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_1_1438023673532_39566"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;" id="yui_3_16_0_1_1438023673532_39565"> <div dir="ltr" id="yui_3_16_0_1_1438023673532_39564"> <hr size="1" id="yui_3_16_0_1_1438023673532_39563"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Seaquestor via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></font></div></div></div></div></div><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div dir="ltr"><font size="2" face="Arial"><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none"> </font></div></div></div></div></div><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div dir="ltr"><font size="2" face="Arial"><b><span style="font-weight:bold;">Sent:</span></b> Tuesday, July 28, 2015 3:10 AM</font></div></div></div></div></div><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div dir="ltr"><font size="2" face="Arial"><br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> Re: [PSUBS-MAILIST] LED Lights<br clear="none"> </font></div></div></div></div></div><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"><div><br clear="none"><div><div>
<div>Hi Cliff, maybe Phil could chime in on his led he demonstrated at his shop for use on the deep workers. It had only a flexible membrane over the oil compensated led housing. I think his design is about as compact as you can get, and I recall it had now fins, but run a voltage up to around 200+ volts. Seems to me that simpler the better, is the idea here. For me I will testing my design hopefully next week. with 4 leds, wired for high and low. Based upon alum cost, machining, leds and subconscious connector I'm coming in around $500 for each light. Cost may drop with multiple units. But one off is always more expensive.</div><div><br clear="none"></div><div>Best Regards,</div><div>David Colombo</div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div><div style="font-size:85%;color:#575757;">Sent from my Verizon Wireless 4G LTE smartphone</div></div><br clear="none"><br clear="none">-------- Original message --------<br clear="none">From: Cliff Redus via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none">Date: 2015/07/26 1:28 PM (GMT-08:00) <br clear="none">To: Personal Submersibles General Discussion <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br clear="none">Subject: Re: [PSUBS-MAILIST] LED Lights <br clear="none"><br clear="none"><div><br clear="none"><br clear="none"></div><div><div dir="ltr"><div>For anyone that has a large LED or halogens on their boat, can you share your experience on narrow beam vs flood lights. Building a LED housing to be low profile to fit in a FRP recess is going to be difficult with a reflector to get a narrow beam. As an example, a typical reflector size for a Vero 29 is 110mm (4.33") diameter and 67mm (2.64") deep. This is massive and you still need housing and heat sink fins.</div><div><br clear="none"></div><div>I am wonder if we really need a focused light or is a flood light adequate?</div><div><br clear="none"></div><div>Cliff</div></div></div>
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