hps light question?

i have three plants growing under t5's right now, i just got my 400w hps light set up yesterday, my question is should i wait untill i start to flower to put in my hps or should i put it in now? will it make a diffrence?

you will get faster growth but many pple will tell you to wait until flower though.

i have never grown with cfls but i would put them under the 400. u got it use it. clone them and use the cfls for the clones that way u can get a flower and vegging area going.

I'd use the HPS now. As mentioned, you got it, so use it.