Are bi-directional lights a separate feature regardless?
“Bi” means that headlights use the same bulb for low- and high-beam lighting, as opposed to having separate bulbs for each.
With bi-xenon headlights, a shutter or shade covers part of the bulb during low-beam use. The shutter automatically moves out of the way when the high-beam switch is activated. Some vehicles are equipped with xenon bulbs only for the low-beam headlight and have a halogen bulb for the high beam. Using the same bulb for both functions saves money and space, giving designers more freedom.
Xenon headlights are brighter than halogen lights and typically have a bluish tint. LED lights are brighter still and create light that is closer to daylight than other types.
LEDs use less energy than halogen or xenon bulbs, generally last longer and take up less space because of their compact size. LEDs, however, are more expensive than xenon bulbs, which are more expensive than the halogen type.
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