Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; lasers, not for medical purposes; light control systems; light emitting diodes (LED), including organic LED, laser diodes, especially power laser diodes, semiconductor power laser diodes for material processing, semi-conductor components, fiber optical light conductors (also LED based fibre optical light conductors), optocouplers, optical sensors, light barriers, LED modules...