The ceiling lamps burnt out in both my bedroom and my home office, both lamps use LED strips instead of light bulbs and they're glued onto the base of the lamps, so the strips can't be replaced without breaking them in the process. I ended up ordering regular ceiling lamps to replace them, but they won't arrive until tomorrow, so it looks like I'll have to use table lamps and battery-powered lanterns for lighting in both rooms for today.