You've seen all the assortments of keychain lights to help you find the keyhole in the dark. Cyberlux® has produced a product called KEON KeyCap, which features an elastic cap that fits over standard key heads, with an embedded light that shines down the key shaft, effectively eliminating the need to add extra stuff to your key ring.

The KEON light source is a diodal lighting element that never requires a light bulb change. The result is a product that is maintenance-free and offers long-lasting light that uses 90 percent less energy than traditional incandescent bulbs.