The LED driver is similar in some respects to an HID ballast. Bit more efficient, fwiw. As for the cooling unit it's not a "cool tube," so much as a plethora of Aluminum fins all connected to Copper heat pipes and oriented in such a way that a single fan can blow air between them all. I suppose you could enclose the CPU cooler in some ducting and extract the warm air from the tent altogether.
It's not one diode, really, there's fifty 1W chips arranged in a tightly knit matrix. You can run multiple wavelengths of chips on the same array. Also, I'll be using a phosphor lens which will be producing full spectrum light. If everything goes as planned it should be a very healthy spectra of light that plants can absorb at high efficiency.
Edit - Ack. I forgot, I'm totally derailing this thread. Sorry, LEDmania.
