Metal halide lamps and recessed lighting for ceilings and false ceilings are suitable for shop lighting, museum, office, living room, hall and exhibition. The lamps have a low energy consumption at very high light output. The life expectancy of the bulb is long. Disadvantage is the long startup time: Approx. 30 seconds, the lamp needed for the first light and after about 2 minutes, reaches its full brightness. Recommended: Wherever the light is needed for one ore more hours, as windowless rooms, corridors, staircases, shop lighting, storage, etc.