DJ,
I'm an apartment grower.
I use a 600W HPS, 192W T5 and one 42W + one 23W CFL. 857W or so total. But then add the fans and an Ozone Generator... I'm just under 1000W.
No problems yet.
I did switch all my incandescents to CFL's. And vacuumed the back of the fridge etc.
It's winter here now, Michigan. My apartment is relatively small so I use the heat from the bulbs to supplement the heat in the apartment. (Cool Tube and what-not.)
That's all I've got to say.