Do I need a reflector? Built a 500w LED array.

SopaSoup said:

Hi friends!

You have no idea how happy I am to be here and that I get to ask questions.

My first question is about my LED set up.

I've had a large amplifier heatsink around.

So I attached 10x 100 watt LEDs -- which I will be driving at around 60-65% of their maximum capacity to up the efficiency.

My heat sink is 30 cm by 15 cm's (so 10 by 6 in.). There are 2 parallel lines of 5 LEDs positioned on it.

I am attaching a CAD drawing to show you what it looks like.

So

1) Can you please tell me in your experience how high I should hang this?
2) Should I build reflectors using mylar glued on MDF around this lamp?

Even though they say light output is at 120 degrees, a large chunk of photons fall right under the chips at shorter heights.

BTW my tent is 1m by 1m (3.3 ft by 3.3 ft). It has diamond type reflective walls.

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MidnightSun72 said:

What's the actual wattage draw on these cobs? If each one is drawing 65w actually then about 2ft above the plants because those are concentrated in a small area. What ar edge dimensions of that heatsink? Not a small task to get rid of 650W in a tiny spot.

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1212ham said:

I don't see a reflector helping and think a fan will be need on the heat sink.

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