Someone mentioned buying spare bulbs, and to that I'll add buy a "surge protector" to plug your equipment into, one day I blew two new enlarger bulbs because of sudden surges or spikes in our electricity here; plus if you get the kind of surge protector with an on/off switch, you can turn on/off your equipment in one shot, this helps me a lot as I go from my bathroom/darkroom to the kitchen/viewing room.

Good Luck!