them long bulbs give me light off the side of the bulb than the end, so you would benefit from one of those arched reflectors, a sort of double arch and the bulb sits in the middle hanging on its side, you could also add some side lighting for the buds lower down, get some lower watt cfls and put them on the walls of the grow, this way you got the main lights above but the side lights will then let the plant have light lower down