3 ms·
The most annoying thing for me is the "blue fringe" on a lot of modern headlights that use lenses to refract and focus the light. These lenses aren't the best a
by HPsquared 2y ago
The most annoying thing for me is the "blue fringe" on a lot of modern headlights that use lenses to refract and focus the light. These lenses aren't the best and have chromatic aberration, resulting in a fringe of blue light at the top of the beam.
Result: people see flashing blue(-ish) light in their rear view mirror. Not a good thing, very distracting!
- globular-toast 2y agoI had this the worst the other day. A car was following me and I kept thinking there was an emergency vehicle behind because I could see the blue fringe. The worst thing about all these lights is they aren't static. For a start I can see the LEDs flickering, presumably due to PWM. Why a fully DC circuit that doesn't even dim the bulbs needs to use PWM is beyond me. But the worst is their "clever" auto levelling and dipping etc. It just looks like the light is constantly in flux which is really distracting and annoying.
- smileysteve 2y agoXenon bulbs run with an ac inverter
- globular-toast 2y agoInteresting. I didn't know that. Looking around online it seems they run at a frequency around 250-300Hz which may be noticeable. I notice it more when lights are far away and in my peripheral vision. I assumed they were LEDs because I've definitely noticed it with LEDs but I guess they could be xenons too.
- smileysteve 2y agoThere's also noise from alternators, which are effectively an ac generator, but have a rectifier and diode that cut it at 12v and DC.