Topcarlight via Amazon offers the Topcarlight 18-watt Cree 4" Off-Road Flood Beam Light 8-Pack for $35.99 with free shipping. That's $6 off list and the lowest price we could find, although we saw these for a buck less in August. Each 6000K light features a 30,000-hour life span.

Note: These lights are for off-road use only.