We can run both lights at once, but not both lights and the heater.

Nighttime temps could be a problem.

Crispi - I wish I knew some elec people!

Stylus - I believe the house is only two circuits (there are two fuses, i think). It's next to impossible to run an extension cord from an outlet on the other circuit to the growroom as currently configured, as the ladies are in a shed. The fuse box is in the basement. Where would the electrician install the breaker? In the basement? Would he have to put in another outlet, or does he run it "inline"? I'm such a noob to electrical stuff... What specifically would I ask him to do?

Peace everyone.