My 2004 Springer has a headlight with a replaceable halogen bulb, bought new in October of 2003 so I know it has never been changed. Don't do much night riding anymore, at 73 I don't do much of anything after dark. I was coming home through the country and it seemed the headlight wasn't putting out as much light as it should. It was a 50/60 watt bulb and I replaced it with a 55/100 so lots of difference. Had a friend tell me the halogen bulb does not dim with age and if it was dim there was something wrong with my charging system. With the difference in wattage it is not an apples to apples comparison. What is your experience with old bulbs, do they get dim with age or is it my eyes? Jim.
I replaced all my bulbs with LEDs. My Fat Bob has dual front headlights which are now bright LEDs. My turn signals in front have the LED white halo that turns off for the yellow LED blinkers but switches back on when cancelled. I have red LED brake lights that strobes when first activated as well as the LED rear turn signals as I ride in the early morning hours to work. They made a HUGE difference in seeing and being seen. I bought mine at HD Kokomo and it's an easy swap. Just plug and play with the only tool being a phillips type screw-em down driver. No fuss / no muss and they draw less amperage.