I am finally setting up a permanent darkroom at home. Power is existing duplex outlets plus 220V 30Amp (workshop is 220V 60Amp) which will give an additional 48 items and keep to building code. Then there are power bars. Lamp sockets are available with an insulator built in to the cord for the switch. A couple of dimmer switches are also a good idea. Running expensive bulbs at 90% of rated voltage probably at least doubles their life without too much change in colour. GFCI protection is totally necessary.