1SaleADay via eBay offers the Titan 15-watt Equivalent 7-LED Light Bulb 4-Pack
, model no. 4LEDSET, for $12.99
with free shipping
($3.24/bulb). That's the lowest total price we could find for this quantity by $33, although it was $1 less two weeks ago. They fit standard light sockets and feature a life span of up to 35,000 hours.