Position bulbs are fitted inside the vehicle's Driving Light and remain permanently lit while the vehicle is in motion. They are positioned at the front and rear of the vehicle, next to the Driving Light and tail lights, and emit a white or yellow light to indicate the vehicle's position to other road users. These bulbs play a crucial role in road safety, as they help to signal the presence of the vehicle to drivers and pedestrians, particularly in low visibility conditions or at night.