Neon Mart via Amazon offers the LE Dimmable A19 Color-Changing 6-watt LED Light Bulb for $9.99. Coupon code "2Y2VLLRD" drops it to $7.99. Plus, Prime members bag free shipping. That's the lowest price we could find by $8. It features 16 colors, is equivalent to a 40-watt incandescent bulb, and includes a remote.