Why is one high beam brighter than the other?
Why is one high beam brighter than the other? As headlight bulbs accumulate burn hours, the filament vaporizes and leaves a grey or brown metallic deposit on the inside of the headlight capsule. The deposit acts like a light filter and can dramatically reduce the light output from that bulb, causing the one headlight dimmer than the other issue. Why are my headlights not working in high beam? If just one bulb fails to work in either high beam mode or low beam mode, it may be the bulb. Most headlight failures that are limited to just high or low...