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How are you planning on configuring your channel aluminum and strips? Vertically or horizontally? I was thinkig of doing a simillar thing with side lights running the channels vertically with and external hole in the top and bottom of the channels. This should draw external air in through the...

I was thinkung of doing that, but I wasnt sure how much that affects the efficiency. I know a resistor creates heat so it does use some energy. I assume not as much energy is used by the resistor, as is saved by not running the LEDs as hard..

So I've got a cab which is just under 8 square feet, which to my understanding means I need around 275 watts for ideal PPFD in and around 1000. I'm going to be using two large extruded heat sinks which I got super cheap off craigslist. They are 24" x 6.5" x 2" According to my calculations they...

Surfer do you know what happened to Knna? I read his thread on another forum (all 100 or so pages of it) and Knna's thread seems to have died off and him absent.