HPS lighting is possibly the most popular choice today. It has a nice redish spectrum whichis best for flowering. Dont give up on florous yet though, theyre a good choice for the vegging cycle. If i were you i'd get a HPS bulb with blue spectrum. These bulbs are called son argo or something. If you get this bulb then you wont need floros or MH. You can the same HPS through the whole plant lifetime and get optimal quality.