As halogen bulbs age, they actually dim. Up to 20-30%. With less light on the road, you’re seeing a lot less than you should be. And that’s a real safety concern. If you do have a burned out bulb, remember to always replace in pairs to ensure that you have balanced downroad visibility.Buy Now
The surface of a fresh bulb filament is clean and smooth, which allows it to generate light that is bright and uniform.
Bulb filaments become warped and worn as they age. This creates hot spots and weak spots that cause them to give off less light, shine unevenly and eventually fail.