These Find a Lights are replacement inserts for light switches that glow in the dark. They’ll need some light during the day to charge up but they should glow all night. Bargain at US$4.99 for a pack of 3.
Each of these three wall-plate inserts glows all night long without electricity or batteries. Simply use your light switch’s existing screws to fasten a Find A Light to your wall plate. The device charges using daylight or artificial light and requires no electricity or batteries to function. The advanced technology of this material provides a bright glow that lasts all night long. You can expect each Find A Light to last over 20 years.