This is an osram dp51 w4f 7 857 this is a low maintance lamp that last 50 000hrs other product benefits include a system guarantee in combination with osram optotronic control gear areas of application include shop lighting hotels restaurants and furniture luminaires the osram dp51 w4f 4 857 fits into standard mr16 fixtures has a luminous intensity comparable to that of halogen lamps mr16 20 w 35 w 50 w and has three core connecting cable with