Our last HID (high-intensity discharge) test was in 2018, when we assessed D1S lamps. Environmental concerns ... by tests at parent company Osram’s conventional light tunnel in Germany, which ...
These D1S bulbs have their own built-in igniter ... To give an idea of just how much extra light HID bulbs put on the road, we tried Osram’s standard performance H7 bulb in a VW Golf Mk6 ...