i use a hps from 3 weeks old until harvest and get good results. my mate uses halide from start to finish. also with good results. though he swears his buds are always denser and tighter packed than mine. but i reckon using both would be best. funds allowing..
jolly green giant Reviewed by jolly green giant on . Metal Halide or HP Sodium? I have tried a metal halide lamp for the first time recently, and didnt think that it gave me as good results as my previous choice of bulb (HPS). I heard that MH were better for vegative growth, and to swap to HPS for flowering, is this true?? Any advice would be most welcome! cheers. Rating: 5