Want to know how I know that?
I'll start with the fact that I hardly ever turn off my high beam. I whole heartedly believe that it assists in my daytime, dusk and evening visibility.
I was pulling out of the garage at work and took note of my reflection in a window. I noticed that said reflection was missing some very vital light. Flipping the light switch to low beam showed that it was working, but I was SOL for my high beam.
I was not pleased. Not only do I use my high beam the most, but it was dark and I had to travel on some roads that do not have street lights and are very much surrounded by forest.
That was the first reason that popped up for needing a new headlight. The second reason involved a rather large furry animal on the above mentioned road with no street lights.
If my high beam had been working, I would have noticed the dog sized racoon that had stumbled onto the road. Unfortunately, the high beam was not working and I saw the racoon come to a stop about a whisker length away from my front wheel.
I'm still having visions of what could have happened had the furry little critter wandered just a little closer or not stopped at all. Gives me chills.
So there you go...I need a new head light...really really soon.