The MK Controls Lightning Bug is based upon the science of lightning. There are two components of lightning; the bright white flash everyone wants to capture and the unseen infrared light that always precedes it. The Lightning Bug uses a high-speed photodiode sensor optimized to the infrared burst that occurs just before a lightning strike. This infrared light comes from the vaporization of air and particles in the air. The Lightning Bug acts as a lookout for your camera, watching for a change in infrared light. When a significant change of infra-red light over a very short period of time is detected, it directs the camera shutter to trip and capture the lightning in action.