Almost all bicycle rear lights use LEDs instead of filament bulbs as they are more reliable and use much less battery power, whilst also offering much higher levels of brightness. Used in flashing mode, they are very good at attracting attention from other road users. It's advisable to use at least two rear bike lights, a common configuration is one flashing and one in constant, this is highly advisable just in case one stops or becomes obscured.

Cateye is the leading manufacturer of cycle computers, bike lights and reflectors. In 1964, Cateye became the first company to create a flashing lamp for bicycles. Cateye invented the first battery headlamp in 1982, and the very first bicycle headlamp using white LEDs in 2001. Cat Eye is a true leader in lens and reflector technology; Cateye's Opticube lens and reflectors allow them to make one of the brightest and most efficient LED headlights in the world.