Mv mercury vapour, blue, maybe it is Mh, to much thinking on my part. 600hps probably just that.
They have adjustable ones, but quessing they would not go with the expensive one, same applies to switchable ballast.
Cuttings are going to be hot under hps, distance and or shade will help while rooting, that's why t5's.

Going cheap, I use under the counter t8' s mounted on board for adjustment, and a cloudy home made dome. Till cuttings take root. I would also do twice what what you need, then use your 9 best, if it don't bubble it ain't worth the trouble.

My cheapo clone box, listed some where, is two cheap totes. Bottom is my reservoir(distilled-super clean water), small fountain pump (Table top size) on timer(15 min. on 4 times a day) to pump water to clones in box above. Above box has hole in middle to drain back to reservoir, same hole used for hose from pump. Use oasis (floral foam) to root in, can get at my grow store in sheets, in blocks at wally world. Cloudy dome - old plastic skylight cut to fit, not tight believe in air flow. Also use gel rooting hormone and a sharp new razor blade, debated on forum, but that's what I use. Attachment 297618