I did the H11/H9 low beam conversion yesterday and while doing that I could see that something was happening on the high beam bulbs:
These are 9005 GE Nighthawks, with about 40,000 kms on them (not all on high beam of course
). They still work but I wonder for how long, so I replaced them with new ones.
Any idea of what might cause this? The drivers side is the worst of the two but both show signs of this weird burning. The burnt part faces up btw, if that matters. And I know not to touch the glass part of the bulbs; I have been using these types of bulbs since the early 80's and have never seen this before.


These are 9005 GE Nighthawks, with about 40,000 kms on them (not all on high beam of course
Any idea of what might cause this? The drivers side is the worst of the two but both show signs of this weird burning. The burnt part faces up btw, if that matters. And I know not to touch the glass part of the bulbs; I have been using these types of bulbs since the early 80's and have never seen this before.