[PSUBS-MAILIST] Light lense

[Alan James via Personal_Submersibles]

Hank,you have got me thinking. I don't want to pressure compensate because of the capacitorsin the driver. I was also concerned that any fluid might yellow with the heat.According to this article, the main problem with LED lights is disipating the heat that comesout the back of the emmitter.http://www.deepsea.com/wp-content/uploads/article-Application-of-High-Power-LEDs-UI08.pdf
I could seal off the driver compartment at the back of the emmitter & fill that with oil. HoweverI will be machining this out of alluminium rod & can keep the enclosure round the driver pretty smallso there isn't much of an air gap to the housing.Could easily experiment with & without oil to see if it makes much difference.Alan

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Tuesday, September 1, 2015 10:09 AM
 Subject: Re: [PSUBS-MAILIST] Light lense
   
Alan,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?Hank 


   

  On Monday, August 31, 2015 4:00 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
   

 Sorry part 2 ( ipad & big fingers)The LED cost $11- & the driver $6-.  Free delivery.I have ordered a number of reflectors for a couple of dollars each.The driver is quite small. With the automated assembly processes& micro sized components, you can't get anywhere near this sizesoldering on the components yourself.Because of the heat factor I am limiting myself to the 6000lm LED.Will be looking at the beam angle I get from these reflectors & available glass lenses, before making up a housing. Looking for a borosilicate lensebecause of the heat transfer & low expansion.I have taken a different route from Ken, but this process he started hasbeen very helpful & motivating, as has been the discussion & informationthat has come out. Alan

Sent from my iPad
On 1/09/2015, at 9:42 am, Alan <alanlindsayjames at yahoo.com> wrote:



I bought a 24-36V 6000 lm & 4000 lm LED array along with drivers, & have another lot in the post.The driv

Sent from my iPad
On 1/09/2015, at 4:09 am, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:


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.
Cliff
On Mon, Aug 31, 2015 at 8:09 AM, Jon Wallace via Personal_Submersibles <personal_submersibles at psubs.org> wrote:


What has happened with the light build?
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