Well, ever since I vacationed in Quebec Canada back around 1990, where daytime running lights or headlights were mandatory for driving, I got into the habit of driving with my headlights on all the time for the added safety here at home... so I hardly ever drive with my headlights off... and I never really noticed much difference whether my headlamp bulbs burn out much sooner than if I left them off during the day...
I did replace the stock 168/194 bulbs in my headlamp accent lights with some very bright 6000K 25-LED bulbs, so they actually are bright enough now to use as daytime running lights by themselves... when I remember I will just turn the parking lights on during the day rather than full headlights - so NOW I might forget to turn my headlamps on when it starts to get dark, lol...!
