The C4 eLED waterproof light is Underwater Kinetics lightest weight primary light. It is designed to fit smaller hands while still offering brightness comparable to lights twice its size. Its water-cooled heat sink increases brightness underwater and improves burn time. For maximum illumination and a comfortable fit, the C4 is the perfect solution. Unlike the standard glass envelope lamps used since Edison, the LED will not break when dropped. The life expectancy is well over 50,000 hours.