yeah your good buddy.
I have the exact setup. Well, I got two 150 HPS's and then I got 2 CFL bulbs for side lighting; each CFL is 42watts. But suppose to be putting out the same as a reg. incadescent 150watt bulb. So, I guess really your getting the same amount of lumens from just using the 42watts of electricity usage. That's my theory..
But anyhow, I have no problems with my setup. None at all...
Good luck with your grow.
peace..