The best inventions are sometimes the simplest. Take this "Cooler Light" from Coghlan's, which works just like your refrigerator light.

A single LED light reflected through an acrylic lens, secured to the underside of the cooler lid with double side adhesive tape, shines automatically when the lid is raised. But unlike the typical refrigerator, the Cooler Light will shut off automatically after 20 seconds regardless if the lid is shut completely.

No more fumbling around in the dark for a beer at a tailgating party. Never happen to you? Me neither but I sure could see using it camping.

$8.99 at Coghlan's. While you're there, check out the "Cooler Dy' which is a simple plastic clip to keep your cooler partially open after cleaning, preventing mold and odor. $3.29 and indispensable.