BIGMONAT Battery Operated Shower Light with Motion Sensor Wireless Ceiling Light RF Remote Controlled Through Walls|Brightness Dimmable and Timer Setting Indoor Lighting,Wireless Shower Light - Amazon.com
Sunbeam wireless LED light with remote wall switch | eBay
KANESIKI Battery Operated Ceiling Light, Wireless Shower Light with Remote and Timer, Color Changing Mood Lighting, Dimmable Night Light for Hallway Pantry Closet Bedroom Bathroom Tub - Amazon.com
Lutron Caseta Smart Lighting 5-amp Single-pole/3-way Smart Tap Master Light Switch, White in the Light Switches department at Lowes.com