This is an osram hqi e 150w cool white clear lamp common areas of application for the lamp include shopping arcades conference rooms auditoriums libaries factories and workshops exhibition halls and trade fairs rail stations pedestrian zones and is also suitable for use in open and enclosed luminaires the lamp is highly efficient and has an average life of up to 12 000 hours available in colours warm white wdl neutral white ndl and daylight d with an e27 cap dimensions