View Full Version : High Power Leds

06-10-2012, 05:50 AM

Have anyone tried theese 10, 20 or 50W high power led for display lightning?




06-28-2012, 06:31 AM
LEDs are taking over conventional lighting everyday. High-power LEDs are becoming more and more affordable. With high current that high power LEDs require, active constant current circuit is the only practical option. Also most of the LED drivers lack dimming function or poorly have dimmer functions.

Floyd R Turbo
06-28-2012, 06:45 AM
jnad, I'm sure someone has tried them somewhere. You would need pretty good head sinks for those, I would think that your standard one from HeatSinkUSA or the like would not quite cut it without active cooling.

06-28-2012, 05:54 PM
Here's a thread from our local club where the guy built a spectrum analyzer and checked a couple of those chips out.

I think one of the really nice tanks in the photos section of this site used those chips also.

07-01-2012, 09:09 PM
What would be the consensus on the China 3w stars for less than a dollar each?

Floyd R Turbo
07-05-2012, 03:25 PM
if you're using them for yourself? knock yourself out. If making fixtures for others? You're going to save a buck now and pay 2 later IMO.

07-10-2012, 12:16 PM
I used the China 3w stars with good results for my display and scrubber

07-10-2012, 12:51 PM
I have used more then a couple hundred china LED's and only had one 12,000K die and this one was a re-solder job while on the heat sink due to a wiring change I made to it. The LED got much hotter then I liked it to. I had a 150W gun on it for about 20 seconds. How is everyone else's luck with the china LED's. Have you had bad luck Floyd?

Floyd R Turbo
07-10-2012, 01:07 PM
I had one SatisLED go out on me but that could have been my fault, not sure. The rest of the series string is still burning away though. Since Rapid got Philips 660s in I just feel better using those for $1.25/each more, the PCB boards themselves are better quality IMO. LEDs are probably comparable.

07-10-2012, 01:16 PM
How many do you have to buy to get them at 1.25? I agree on building for others its best to use better stuff for sure. I have actually been very pleased with the china LED's for my personal stuff. I agree as well about the boards, the china ones can vary a bit in quality.

Floyd R Turbo
07-10-2012, 01:22 PM
No I meant $1.25 more than SatisLEDs

07-10-2012, 01:42 PM
I guess I wanted to read them at that good of a deal!!! LOL. Did you see the groupled post about their special on 660's?

Floyd R Turbo
07-10-2012, 02:01 PM
you mean LED Group Buy? They look like they come on the same crappy stars that SatisLED ones come one. Works OK if you use thermal epoxy I suppose and for many DIYers they're probably just fine, but since I build for others I decided I'm only using the best parts. As for the LEd chip itself, they just say "exotic" which could mean they come from anywhere. Like you have said though, you've had very little problems so they're probably OK I just choose the Rapid ones instead. I like to use the thermal pads and the Rapid stars are always perfectly flat vs the cheap ones where 1 in 20 have to be sanded down and I don't find out about that until I put them on the pad and they 'wiggle' and then I waste a pad.

07-10-2012, 02:52 PM
I have got the satisLED and they appear to not be as good of a board as the ones I get from the topled on ebay. When I was talking about the board I thought you were referring to the solder side of it. I have seen a few of the topled units with the solder pad in need of a little more careful solder job. I also use only the thermal pads as well. I did notice a couple of the satisLED that had like a warped board almost like the cutout die bent it a bit.
I have made a couple Display lights for the locals and I didn't use the china ones either. I like the idea of the Phillips brand and want to get some for the next round.

07-11-2012, 08:14 AM
After the summer i am going to start an new nano reef ( about 42 gallon), so i am still looking for a diy led project for this tank.
The tank is a open glass aquarium with no canopy, so one of my biggest consern is that i must avoid to mutch light reflections in to the livingroom where the aquarium is placed.

It is two alternativet that i have in mind:

Alternative 1 : http://www.nano-reef.com/forums/index.php?showtopic=267432

Alternative 2 : http://www.ebay.com/itm/1pc-50W-Actinic-Royal-Blue-Hybrid-Led-for-Aquarium-Lamp-Waterproof-Driver-/110905682996?pt=LH_DefaultDomain_0&hash=item19d27e6c34

With this heatsink: http://www.ebay.com/itm/1PC-White-100w-50w-Led-Heatsink-FAN-Aluminium-Cooling-/190700762487?pt=LH_DefaultDomain_0&hash=item2c66a6b577

I am concerned about alternative 2 will give too mutch reflections to the livingroom and that one small 50w light source will be too intense and problems with covering th whole tank. (the tank is 80 centimeter long). A noisy fan foor cooling the led/heatsink is also one of my concerns.

Here is a guy that have replaced his 250w HQI with 100w led:

Any thoughts ?


07-11-2012, 10:24 AM
The only way to avoid fan is to use multiple smaller chips on oversized heatsink. Not a big deal for your size tank.
I cant find right place to buy heatsinks in Eu though.

07-11-2012, 11:03 AM
The dealer of this heatsink claims this one will give suffcient cooling for one 10w led with no fan:

The only way to avoid fan is to use multiple smaller chips on oversized heatsink. Not a big deal for your size tank.
I cant find right place to buy heatsinks in Eu though.

07-11-2012, 11:22 AM
You always can try to see if claims are troothfull. If you have good conditioning in your room for summer time - these can work.

07-11-2012, 02:13 PM
Hmm, i think i would need about 5 of these 10w leds over my 42 gallon nanoreef. Alternative 1 is cheaper and the gu10's seems to work very well when reading the tread, just have reading though the 70 pages :)