I use CFL's throughout. 4- 105 watts, 6 -50w, and 4- 26w bulbs. I use lights from the blue and the red spectrum. Keeps the plants happy through the whole grow. heat and noise are a huge concern here so I can't have the hum of lights. I bought a small 3 1/2 lb carbon filter from e-bay for $69 I use it to filter the smell and take care of air exchange at the same time. it is ultra quiet.