I have 3 plants under 5 (42)watt cfl that's 2weeks now in looking very good,when should I switch over and why do people switch over, do the plants grow faster under the hps ballas, because I understand the reason people use cfl during the veg stage( cheap light bill, don't stretch plant,easier to manage the heat)ect...but i want to understand if I veg with cfl would the plant come out different than if I would veg with the hps balla with a mh convertal bulb? I also heard the hps is not that bad on the electic bill either, so I'm just trying to get some understanding
MH is best for veg, HPS for flower. So if you only have MH and some CFL's then just use them combined throughout the whole grow. If you have an HPS too then use the CFL's throughout and MH for veg then HPS flower.