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You may want to try some .040 sign grade white aluminum. You will get more reflectivity from the aluminum instead of duct work. That stuff is absorbing most of the light that is hitting it. THe aluminum is used in all channel letters and sign boxes. Stop by a local sign shop and see if they have...

Hello all, I have been reading over some posts and find them very interesting. Hopefully i will be able to contribute. What is the typical height the lamps are kept from plants? What would the standard power consumption be for a typical grow room. What if a cathode tube could be produced where...