As I am not an electrician I cannot comment specifically to your question.
I currently operate 3 1000w MH bulbs on a 30 amp circuit, but with a 240v outlett; not 120v. However; I have seperate outlets for my inline fans, T5 lamp, and my CO2 burner. This is on the advice of my electrician.
I have another room which operates 8 1000w HPS bulbs on a 50 amp, 240v circuit. Once again everything else is on seperate circuits.