This is an osram hqi e 400w coated lamp with an e40 base these lamps come in colours neutral white ndl and also in daylight d and have an average life of around 10 000 hours areas of application include factories and workshops exhibitions halls and trade fairs sports halls and multi purpose halls and also in approved enclosed luminaires the lamp is available in clear and coated versions dimensions amp weight diameter 1200 mm length 2900 mm light center length lcl 1980