i put seedlings under 400 hps with the light about 3 feet away and with a fan on and the seedlings stretched, i think i read on overgrow that veg needs more blue specrum light and flowering needs more red spectrum.and hps is more red. now i always use flouro for the whole veggy time. with good results.....just an opinion..
jolly green giant Reviewed by jolly green giant on . question i have 3 150 watt HPS light should i use them from start to finish or use fluro in beggining or just have the HPS in the whole time? Rating: 5