I can't say if they're universal, but they are definately standard. In my apartment the main rooms have them, basically anywhere a central ceiling light would b

I can't say if they're universal, but they are definately standard. In my apartment the main rooms have them, basically anywhere a central ceiling light would be placed. Areas like kitchen,bathroom and entrance have recessed lighting with Edison screw bases for the lightbulbs. It was fairly dark in the first few days in my unfurnished apartment until my light fixtures arrived. I've noticed the same type lighting in four 'furnished' apartments I previously stayed in.