i was asking more so about HPS lights but this is intersting stuff too... u say u definalty need side light in flower, where would u do this side lighting.... like on the outside of the tables plant height?since you used the term bulbs plural i assume you are talking about floro light, in which case you definately want some side light, especially in flowerr. just hanging cfls or tubes above the plant isn't going to get much growth out of the lower stuff. depending on the setup that might be what the grower wants.