TopperSun via Amazon offers Prime members the Minger 13.5-watt (100-watt equivalent) Dusk to Dawn A20 LED Light Bulb 2-Pack for $21.99. Coupon code "UEOKSUVE" cuts it to $14.95. With free shipping, that's $2 under our mention from three weeks ago and savings of $7 off list price. They automatically switch on at dawn, and off at dusk. Deal ends June 17.