I've visited a dispensary grow right before lights out,.... and as soon as the lights shut off they turned on a bunch of green CFL's (home depot) They claim they haven't had a problem even keeping the green lights on for hours after the HID's went off.

Personally I use a "Green Lantern" LED headlamp for maintaining my girls during night time, but I suppose if your grow is big enough some overhead lighting would almost be needed.