Less. Mine run off an electronic ballast and I have a kill-o-watt meter monitoring my energy use. I have a 1K MH light and the power draw ramps up over the ~2 minute start up.
www.mixglo.com
I have a tritium vial on every light I actually use. Super useful for grabbing the light in the middle of the night. I also have tritium on my keys and a few of my backpacks, same reason.