An hour later I went to the store, doing the grocery run I punted on Tuesday in the wake of a MAC address table induced migraine. Coming out of the parking lot I noticed it was very dim indeed, and then an oncoming car flashed it's lights at me, confirming my worst fear. Thankfully I navigated the three blocks home without incident. I think I'll be calling the dealership in the morning*, and quite possibly taking the T to work
*Yes, I know I could theoretically locate an auto-parts place and attempt to find my way there and get the right type of headlight and then install it. I just don't want to do that. I want someone else to deal with it for me. One of the advantages of having a decent job is that I only have to remember how to get to the one dealership and I can just pay them to cope with anything automotive for me.