This Dimmable Light Bulb, originally $11.99, drops to $8.39 when you enter the promo code UMQEBBP6 during checkout at Neon Mart via Amazon. Shipping is free when you use a Prime account or free Prime trial. Shipping is also free when you spend $25 or more. Otherwise, it adds $5.99. This is the best price we found by $3. This has eight brightness settings. Note that this price is for the single bulb option, but you can get a similar discount on the two-pack by using the same code. Sales tax is charged in most states.