[PSUBS-MAILIST] LED light

Fri Sep 8 17:09:40 EDT 2017

Hank,
I agree with you on using something off the shelf that you can adapt.
I bought at least 15 aluminium lights, hoping to adapt them to an 
underwater light. All around $10.
None of them worked out for me, but if I saw anything with potential I 
would buy it. 
I am doing 4 lights at once which speeds up the process on the lathe,
but it still is a lot of work.
I am still puzzled at you're high lumens, as most car led lights I saw were 
a maximum of 100W ( 10,000 lumens)
Cheers Alan

Sent from my iPad

> On 9/09/2017, at 4:32 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
> No, I got it right, 48,000 lumen for the pair and there are also 96,000 Lumen per pair.  Now thats' bright;-)  I am not sure how they will work but for the 10 minutes it took to put bulbs in my fixtures, it is worth a try.  I do NOT want to rely on one light source.  Imagine you drive 4 hr to the dive location then 1 hr to get on site then you dive 380 feet to the wreck and you spot the gold and your light quits.  At 380 feet it is dark!   I currently have three separate light sources with separate power sources and separate switches.  
> Hank
> 
> On Thursday, September 7, 2017, 8:31:04 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Hank,
> you sure you got the Watts right?
> A ball park figure is 100 lumens per Watt, so that would mean a
> 240W lamp.
>    I think I know the type you refer to; cob on a pedestal. I believe
> they would rely a lot on the reflector configuration or the light
> would just go straight out the sides. Also car head lights are more
> spot lights than flood that we require. It would end up a lot larger
> than if you went with the type of led that Cliff, Alec & I are  using. 
> These have a built in wide angle, & I am not needing any  reflector.  
> You can use a focusing lens if you want a spot.
> Was googling & found this 100W round Cree led that may be an alternative
> for Cliff. 
> http://www.cree.com/led-components/media/documents/ds-CXA3070.pdf
> Alan
> Sent from my iPad
> 
>> On 8/09/2017, at 1:24 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Hi All,
>> I am conducting an experiment with LED lights.  I have ordered two car LED headlight lamps.  They are 24,000 lumen each.  I can fit the lamps inside my full ocean depth housings from eBay  (12,000m)  I am wondering why nobody has tried these bulbs?   They are compact and super bright.
>> I have mounted the lamps on Gamma with temporary halogen car headlight bulbs.  I will swap the bulbs out when the new ones arrive.  
>> Hank
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> 
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