Only speaking from personal exp, but I use a 150w hps. I have done both... vegged w/ the hps from seed and with cfls.

I've noticed that... my observation, which may or not be the difinative truth... The plants respond in the following fashion: HPS from start = faster vegative growth low-mid bud growth. CFL from start to HPS flower = slower veg growth but mid-high bud growth. My hypothesis is that the plants respond more to the increase in lumen during flower.

Hope it helps :jointsmile: