STEDI D4S Xenon 35W HID Bulbs (Pair)DESCRIPTION BETTER THAN OEM HID UPGRADES. The D4S Xenon HID kit produced by Philips and Osram is 25W without a capped brightness of 2000 Lumens. It's capped at 2000 Lumen so car manufacturers are not required to fit auto leveling and washer systems. The very best Xenon kits found in the high end euro cars are all equipped with 35W units from the factory. PLUG & PLAY. Unlike other retro fit solutions on the market, our D4S doesn't require any adaptors