Heat shouldnt be a problem now that Im using a desk fan as active intake. Im gonna use all the lights I have. Youre right, dont wanna remove lumens that I have. And the UVB bulb is supposed to be safe for the plants, but precaution has to be taken for our eyes. Basically, I just have to turn off that bulb before I put my head in the tent. And if this still doesnt do it, Ill make the trip to Lowes.