Osram dulux de xt 18 w840 4008321507556 this is the osram dulux de 18w840 the lamp has an exteptionally long life of up to 36 000 hours used with quicktronic some areas of application for the lamp include shops supermarkets amp department stores offices public buildings hotels and restaurants street and city lighting and outdoor use in suitable luminaires dimensions for the product are as follows overall length 1440 mm length 1460 mm