Amazon has the Kasa Smart Motion Sensor Dimmer Switch (ES20M) for $30 - $5 off with coupon code 5KASAMOTION in cart = $24.99 with free shipping on $25+ or with Prime. Automatically turns on the light when motion is detected and turn off after a preset time. No hub required.

Bonus Savings Tip: Prime Card members get an additional 15% cashback ($3.75).