OSRAM XENARC® and XENARC® electronic lamps have three times the luminous efficacy of tungsten-halogen lamps. The values for D1S and D1R are identical to those of D2S and D2R. With the development of the XENARC® electronic D1S and D1R, OSRAM is helping to improve and simplify gas discharge headlight systems. By integrating the starter in the lamp base the lamps can be made more compact and the interplay between the lamp and the electronic system can be optimised. Important: Because of their high voltage, XENARC® and XENAELECTRON® products may only be replaced at authorised workshops.