TopperSun via Amazon offers the Minger 60-watt Equivalent Light Sensing Dusk to Dawn LED Light Bulb 3-Pack in Warm White for $19.99. Coupon code "DZJCW5PB" cuts that to $12.99. Plus, Prime members bag free shipping. That's a buck under last month's mention, $7 off, and the lowest price we've seen. They feature a 600-lumen output. Deal ends August 25.