'S actually been a few years since I had any 4537's. In my day a few of us used them "carefully." I don't know if I will again, but I will CERTAINLY check out those halogen replacements.
I can still remember the CHP, 1972:
"Sir, you have illegal aircraft landing lights installed in place of your high beams. You are going to have to remove them."
This was at a roadside surprise smog check in the daytime. I NEVER got stopped for actually using them.