There are both battery and hardwired lights (bulbs) out there that have battery-powered remote transmitter switches, as well as battery-powered remote motion sensors. Maybe check out the Phillips "Hue" stuff.
The switches typically look just like standard wall-plate switches, and can be stuck anywhere with double-sided tape (usually included) if you don't want to permanently affix them.
Or, maybe a couple of these would suffice:
https://www.amazon.com/DROK-Stick-Anywhere-Rechargeable-Energy-saving-Environment-friendly/dp/B01LEEE7AY
Or these:
https://www.amazon.com/Silipower-Rechargeable-Cordless-Nursery-Required/dp/B01F6M3OAY
EDIT: Looks like Sid was quicker on the draw there...
