Not worth $2,100 but a really great LED design....

the designer claims the LED will last 40 years because the temp stays very low. temps stay below 55 degrees.

Check this !!!!!!

http://www.jakedyson.com/products/ariel-downlight/

Are you sure it is $2100 for 66W? Also, only 32% efficient. That works out to $100/PAR W. For that much money you could build 5 lights running at 65% efficiency.

I'll build you an identical fixture for $2000... if you're super cereal



@Imaulle

guod brought it up in sept...

guod said:

CXA 3050; passiv cooled; 66 Watts

http://www.dwstudio.co.uk/case-studies/jake-dyson-ariel-uplight-downlight/

Click to expand...

Looks like a cpu cooler simply bent down..lol. I'll make ya one for $500

For someone not involved with leds i can see why they'd be extra impressed..

I'd pay at most $200 for just the fixture, then put in my own cree LED.. if this is so easy to make, then show me how haha

I'm confident in my crafting skills, although replicating any thoughtout design has it challenges.

From testing a variety of heatsinks, I found the Alpine 11 slightly outperfpormed the Freezer 7 Pro. The Freezer 7 has a lot more surface area and heat dissipation capacity, but it uses the heatpipe design with a relatively small copper pad. The Alpine 11 is one chunk of aluminum with a thick base and relatively thick fins, so it moves heat faster than the copper pad heatpipe design. So for our purposes if you wanted to passive cool that 66W COB, the heatpipe design is unnecessarily expensive and less than optimal. You could use 10" X 10" HeatsinK USA ($35) or one of those big round passive heatsinks. It would run even cooler and put out more light mounted on a $10 Alpine 11 with fan running at 6V.



1 pound chunks, Alpine 11 and Rosewill RCX-Z1


But all that is splitting hairs anyway and wont make much difference in light output. To really make a better light we have to look at current droop. With a 4K Vero 29 @ 1.75A it would be 130lm/W. With 4K CXA3070 it would be 135lm/W. With a pair of CXAs at .9A it would be 162lm/W. (I know most of you guys already know this.)

I would love to replace my shop and garage lighting with some of those. Purely for aesthetic reasons. Those lamps are very sexy looking. CPU coolers may work better, but they're not as 'pretty'