If replacing your light bulbs with smart ones isn't an option, check out this deal on the Kasa Smart Light Switch HS200. Kasa Smart Light Switch: Turn any light switch smart for $12.99 - Android ...

As of this writing, the Aqara Smart Switch was selling for around $29 on Amazon (after you clip a coupon). That makes it one of the most affordable Zigbee light switches on the market.