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50w LED Spotlights? Anyone using these?


AquaticEngineer

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I just purchased this from ebay as a test light setup:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330524311181&ssPageName=STRK:MEWNX:IT

 

Along with this for the heatsink:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370494796097

 

They do sell optics for these lights on ebay, they sell 90 degree, and 60 degree lenses. I'm working on using an old lens from a surveillance camera as an adjustable LED lens.

 

Here are the lenses from Ebay:

[url=]http://shop.ebay.com/?_from=R40&_trksid=m570&_nkw=50w+led+lens[/url]

 

Right now my total cost on the test light is $54.87, and my neighbor funded me $50 of it to buy one and test them out to see if he should use them over his reef he is building.

 

Wish me luck and fast shipping :)

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Oh for sure, there will be many pictures :D Estimated shipping date says between April 6th and April 19th, so I got a little bit of a wait until I get to wire it up.

 

I did however find a 12,000K 50w LED bulb on ebay for $48, this is the same spectrum bulb that Ecoxotic is using.

http://cgi.ebay.com/HIGH-POWER-50W-12000K-WHITE-LED-4000-4500LM-24-26V-/390245307832?pt=LH_DefaultDomain_0&hash=item5adc6ed5b8

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So being the completely clueless person I am' date=' How many of these would I need over a 27 gallon hex? I know the hexes are deep, but I don't know how the penetration of this would be...[/quote']

 

This 50w LED is essentially the exact same thing that Ecoxotic is using in their 50w LED cannon fixtures.

Here's the link to the thread with a video of them over a giant tank at Legoland.

http://www.pnwmas.org/forums/showthread.php?25163-Legoland-aquarium-LED-retrofit&highlight=LegoLand

 

Only difference in my light and their light is the kelvin rating. Mine is 6500k theirs is 12000k. They sell 12k LED bulbs on ebay for about $50ish, I just didnt want to spend that much on a test light.

 

Also, Ecoxotic doesn't utilize a fan on their lights because the majority of the fixture is made out of solid aluminum and acts as a very large heatsink.

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I'd imagine with one of these lights you could grow SPS on the sand bed down to 30", lol. I will know better for sure in a day or two though what the par rating is at different depths.

 

My friend that helped fund this experiment is getting a PAR meter so we can check this out and do a side by side par rating against a 250W halide he has setup.

 

It'll also help quite a bit once I get the optics over it to concentrate the light.

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Based on that video' date=' I'd say a 50watt one of these may be way too much. WOW.[/quote']

 

They also make these lights in 10w 20w 30w and 100w as well as the 50w. The down side to these is that there is not a lot of optic choices.....yet.....and you would still want to supplement with dimmable blue LEDS to get the right visable color spectrum, if you care about that kinda thing ;)

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I'd be worried about the 6000-6500K part

 

Thats just for this one as a test bulb to see if I can get the same penetration as a halide. They sell 12K and 20K versions of these LEDs for around $50 shipped. You could also just add blue T-5's or LED's to supplement the color unless you wanted to run a single fixture in which case I would just go to a 12k or 20k.

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Thought I would share the LED lens and reflector I'm going to use on my 50w setup. Its a 60 degree angle lens and reflector shipped for under $6. I still need to find an adequate housing for everything, but it will probably be an aluminum tube or something unless we just keep it as a retro fit.

 

http://cgi.ebay.com/10W-20W-100W-LED-Lens-Reflector-Collimator-50mm-Base-/360357692501?pt=LH_DefaultDomain_0&hash=item53e6fe0455&autorefresh=true

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