You are growing useing a t 5 rig, carbon flurecent? I screwed a t 4 rig vertically into my back wall, 2 vitamin lights 2 full spec, I dont like them, it's hard to get that light to penetrate your canopy, and sometimes you get leaf sploch, you can buy metal halide lights dirt cheap, problem they throw off a lot of heat, but if i did not switch to led i would not go with carbon flurecent I would go with MH, heat and all, I only screwed mine up for backlight I have an led full spec vegmaster for my canopy, but when I did grow with my t 4 I would get splotchy leaves, could be that type of light does that I never really figured it out, but when I switched to led that noncence stoped, if you are that worried flush out your plants, buy a bag of DR Earth sprnkle a bit around your plant and water not only will DE Earth kill any pests you may have going on if you do but more importantly it will add a bit of cal mag, to your plant its organic and wonthurt it, this may help you if you are getting light bleaching, your friend. SNOLEPERD