[PSUBS-MAILIST] LED Lights

[Tom J Whent via Personal_Submersibles]

>From a scuba diving perspective, a dive light with a more diffused beam is often preferable. Generally underwater visibility is limited to 20-40 feet, in relatively clear water, and a wider beam will illuminate a broader area without so much “hot spot” to reflect back to the viewer.

 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Ken Martindale via Personal_Submersibles
Sent: Sunday, July 26, 2015 4:55 PM
To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] LED Lights

 

Along this line, a High Intensity Discharge automobile headlamp produces about 3000 lumens. The LED array  produces about 10,000 lumens.

 

ken

 

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Cliff Redus via Personal_Submersibles
Sent: Sunday, July 26, 2015 4:29 PM
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org> >
Subject: Re: [PSUBS-MAILIST] LED Lights

 

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.

 

I am wonder if we really need a focused light or is a flood light adequate?

 

Cliff



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