Sengled USA via Amazon offers the Sengled Solo Dimmable Smart LED Bulb for $29.98. Coupon code "50KVL2XG" cuts the price to $14.99. With free shipping for Prime members, that's $15 off list and the lowest price we could find. It features built-in stereo speakers, a 25,000-hour lifespan, and app control access. Deal ends July 13.