View Full Version : LED Help.

11/06/2011, 04:07 PM
Ok folks, I just got half of my LED's up and running and I have the meanwell driver set at 750mA, with a 5v wallwart going to the POT. Out of curiosity does the size of the wall wart (up to 10v) determine how bright the LED's will get? Also can the Cree (12) leds take more than 750mA to get brighter? Just curious as im looking to maximize my light output for my 26 gal bowfront. This is still someone new to me. Thanks again everyone.

11/06/2011, 08:25 PM
I should.mention these are all cree xp-e and xp-g leds

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11/07/2011, 08:33 AM
I could be wrong, but I think you would get more responses in th DIY section. I'm pretty sure xpe leds can be run up to 1 amp, and xpgs can go to 1.5 amp.

11/07/2011, 09:13 AM
1000mA is the maximum current for XP-Es
You will probably shorten their life by a lot and depending on how good your heat dissipation setup is they may even burn out.
Max current for XP-G is 1500mA
Same advice. You will probably be good till 1200mA if you really need it that bright.
Careful corals burn from the LEDs. Good luck.

11/07/2011, 10:42 AM
How did you set the driver at 750? The voltage across the DIM + and Dim - are a partial factor in determining LED brightness. There also 2 internal controls. What kind of Cree? As mentioned that makes a big difference.

I assume this is an ELN driver.

1) set the maximum current that you want (depends on LED type) with the internal SVR controls when the dim + and - have 10 volts across them
2) then you can use the external pots (with a 10 volt signal) to determine the actual current that you want