Laser Igniter

A device that uses concentrated light energy to initiate reactions, start engines, or otherwise make things happen with the precision of a photon scalpel. Unlike your average spark plug, which just kinda zaps things and hopes for the best, a laser igniter delivers exactly the right amount of energy to exactly the right spot at exactly the right time. In theory, this means cleaner combustion, more efficient engines, and the ability to start reactions that ordinary ignition can't touch. In practice, laser igniters are mostly used in research labs to study combustion and in rich people's garages to show off. The dream is laser-ignited fusion power; the reality is a very expensive way to light your barbecue.