Quote Originally Posted by aheadatime
metal halide, theyre on the red spectrum i believe which is good for vegging while HPS is strongly on the blue, which is good for budding. it could be other way around, but know HPS is good for buds while MH is good for veg. you should really consider LSTing your plants, or tying them down to make the other colas stand out more. your plant looks to skinny and to focused on its main cola.
Its the other way around, HPS emits a red spectrum good for flowering, and Metal Halide is a blue light good for veg