E40 powerstar hqi t 2000di metal steam bulb for closed lamps osramproduct advantages high efficiency screw socket e40 for simple bulb handling long lifespan thanks to the uv filter significant undershooting of the max permissible uv thresholds according to iec 61167usage areas halls for industry and trade sport and multi purpose halls industrial systems airfields wharf and harbour facilities classification yards container floating terminals only permitted for operation in close