20W even 50W LEDs????

[ouling]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110217602492&ssPageName=MERC_VI_RCRX_Pr4_PcY_BIN_Stores_IT&refitem=110197982653&itemcount=4&refwidgetloc=active_view_item&usedrule1=CrossSell_LogicX&refwidgettype=cross_promot_widget">http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110217602492&ssPageName=MERC_VI_RCRX_Pr4_PcY_BIN_Stores_IT&refitem=110197982653&itemcount=4&refwidgetloc=active_view_item&usedrule1=CrossSell_LogicX&refwidgettype=cross_promot_widget</a>

I wonder about this in the reef lighting application. 3500 lumens each?? Have 4 of these-total of 200w-and your tank would be set! Almost no heat + lower power consumption compared to the light output = Owning my HQI setup. Anyone want to try to build one?

 

[wbholwell]

It doesn't look like there are any optics on this chip, and optics are to LED's as good reflectors are to normal tank lighting.

 

[cameron]

This chip is impressive, but the 100w is coming in a couple months.

As for the lens and reflector on an LED it does exactly the opposite of a reflector. The optic spreads the beam rather than focuses it. You can use any number of reflectors with that unit but you won't be able to buy a custom snap in one like you can with the Luxeons.

LEDs over the next 2 years are going to take a HUGE leap forward and one of the big reasons I say avoid current LED technology in the aquarium. Every few months that go by you can watch that several k investment drop like a rock.

 

[cameron]

Everything technical you wanted to know about that chip:

 

[kwl1763]

I total agree with Camaron that we are finally seeing some real progress here and the "reflector" (actually they are deflectors) are the biggest reason that need work to make it viable to get decent spread. With the power on these suckers increasing rapidly now it ill probably only be 2-3 more years before these become reasonably enough priced and perform well enough to compete with MH.

 

[ouling]

I really want to make one of these things. But I more worry about the salt evaporation that may harm the LEDs and shorten their life. Have anyone made any progress in this feild?

I was thinking about a having these suckers mounted on heatsinks and maybe an extra fan would take care of the heat, some short of enclosure to protect against salt splash and salt evap.

 

[purplegorilla]

Ouling, have you seen this? I saw it while browsing for 400 w halide system.

 

[ouling]

I bought one of those 4 panel ones and had to return it. It is pretty bright, but it does not have the intensity needed to go deep into the tank. The lumen calculation I got for the 4 panel 900W LED unit is about 3000 when they're stacked in a 24'' X 24'' square.

 

[wbholwell]

purpleGORILLA;136987 wrote: Ouling, have you seen this? I saw it while browsing for 400 w halide system.

http://stores.ebay.com/High-Tech-Garden-Supply_L-E-D-GROW-LIGHTS_W0QQcolZ4QQdirZ1QQfsubZ16268213QQftidZ2QQtZkm">http://stores.ebay.com/High-Tech-Garden-Supply_L-E-D-GROW-LIGHTS_W0QQcolZ4QQdirZ1QQfsubZ16268213QQftidZ2QQtZkm</a>[/QUOTE]

I like that they state "No HEAT SIGNATURE detectable by infrared cameras" as the first selling point.

 

[ouling]

http://www.made-in-china.com/showroom/cnbsled/product-detailuMJETdlYOPco/China-300W-LED-Grow-Light-BS-29-.html">http://www.made-in-china.com/showroom/cnbsled/product-detailuMJETdlYOPco/China-300W-LED-Grow-Light-BS-29-.html</a>

I found this on my friends site.

 

[cameron]

If you properly heat sink the LED, the humidity won't effect its performance. I can see no reason why salt would be a problem.