a little lighting help

im doing a mainly cfl grow room with about six 100 watt cfl's. If i already have the ballasts and the lights(so i'd wouldnt be spending any more money), would it help to add two 100 watt HPS lights to the room? I mean, the more light the the better, right? It definately wouldnt hurt though, would it? Have problems ever occured due to mixing light types?

If someone could me some anwers to the questions it would be greatly appreciated.

well more info would help, like the size of your grow area and everything. Give as many details as you can.

First off, i get the feeling that those cfls are 100 watt equivalent
and actually only draw about 25w each, but anyhow YES add the hps's. During flowering is when the hps will really shine.