HID The D1S 150% POWER xenon bulb is a much stronger version of the standard D1S bulb. Thanks to the new technology, the filament is as much as 50% more efficient (greater brightness and more light on the road) and its unique design guarantees long and stable operation. Filament intended for original xenon headlights requiring D1S bulbs (xenon headlights with a lens). It does not require any modifications to the installation. It has a perfectly set focal length and a voltage plug typical of a D1S bulb. It can only be used with the D1S xenon converter or another one with the D1 Adapter.