my rusty memory says that Jan Heine has written about this in the past. I think the results were mixed.

Personally, I anticipate a day that a vintage bike won't be complete without authentic incandescent bulbs! In the same way that learning to shift a Cambio Corsa is a rare skill, being able to ride at night by the flimsy light of an incandescent will be the hallmark of a true vintage person. My plan is to retire off of the profits from my stash of Philips 3 watt bulbs.

optimistic Steve in Peoria