wilmas are great if your like hydro who is away to work weekly, since your ther 24-7 stcik with airpots and watering daily.
as for bulbs, ur using dual spec so thats why you have got the stretch u have, mh makes plants stickier wuth more nodes and tighter spacing,weras dual spec doesent, kinda like using a 2700k for veg, same deal, stecth rather than growth, if you get me,
as for the green power bulbs, not worth it matey, u can get a 600 sonT for like 20 qwid if that, ur paying over double for a g power one all for a poxy extra 2k lumens, and since anormal one has 90k its fuk all
also if ur runing 1k, u know using 4x250 or a 6 and a 4 u get MUCH better growth ,,, and 1k hps does NOT put out as many lumens as a 4 and a 6 or 2x 250 or watever