O in that case maybe a ph problem. I leave veg on 24 hours as well and have never had a problem with it. Cool white flouros are the best spectrum for flouros. I have never used the full spectrum t-8s and dont know what the degree kelvin they run at is. If you want to convert degree kelvin into nanometers take 300,000 and divide the degree kelvin and you get the nanometers. 360 to 720 nanometers is the pure visable light. I have talked with Phillips in the Nietherlands a few times and most plants need 36.3 % blue light 58.3% yellow light and 5.3 % red light for proper growth and vitamin development and breakdown. Different vitamins develop and breakdown at different frequencies. Blue produces cholorplasts and yellow breaks it down. Hope that is helpfull it is tuff to say with out seeing the problem but I dont have a camera either.
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