I dont veg under HiD lights they grow too fast for me and stretch out too much. (even MH) But I'm not saying don't do it. i know a lot of people that are very successful vegging under HPS just depends on what you wanna accomplish.i have a tangerine kush plant under 600 watt orange. is that the proper budding light. also she is about 2 ft tall and fat around the edges... is this a perfect time to start flowering n she is going into her 7th week... i have pics if u wanna see