Osram hci ep 50 w830 wdl pb coated metal halide lamp with an e27 cap the lamp is a single ended discharge lamp with extremely high efficiency that provides a white crisp light due to powerball ceramic technology the lamp is mainly used in foyers shop interiors and windows pedestrian zones and public squares parks and gardens and also in street and outdoor lighting in suitable luminaires exhibition halls and fairs and also in museums and exhibitions it has a very long life