from what I've read about some LED drivers,I assumed that if you have a driver that ran at 1000ma you could connect 2 strings of 500ma LEDs and it would split the 1000ma current between the 2 strings....
Quote from: redtop03 on Apr 23, 2013, 12:54 amfrom what I've read about some LED drivers,I assumed that if you have a driver that ran at 1000ma you could connect 2 strings of 500ma LEDs and it would split the 1000ma current between the 2 strings....Exact opposite. Very difficult to balance current between two strings of LEDs in parallel; heat, age, etc. will throw off the balance and/or it will just be generally unstable.You must be trying to run a massive heap of LEDs. You should try looking for an AC-powered driver, but going that route you won't be able to dim them (well, the cheap ones are typically not dimmable). Then again if you have that many LEDs you could turn them on and off in groups (relay board/shield, etc.) for the same effect.
I've never did anything with LEDs before so I'm still trying to learn...I don't think this driver shield is gonna be enough for my needs,looks like 36 LEDs will be the max I could use without stacking about 4 of those shields...I appreciate the help
That is quite a massive tank!It looks like you are trying to directly compare the lumen output of a metal Hali lamp with the lumen output of LEDs. Traditional lamps, including metal halide, distribute their light ove a much steradian, thus the need for large reflectors to collect all that light.LEDs distribute their light much more dictional and with appropriate TIR optics are able to direct their light output with much higher optical efficiency. So light output per steradian - light density - is more important than overall lumen output.