I’m having an old man moment……

When going to main beam, should the dip beam go off, leaving sides still on?

Thanks in advance,

The Baron …

Ps I’m using sierra stalks (89 vintage)

[Edited on 24/4/24 by The Baron]

it used to be that dip would always go off when main beam selected, - else the bulbs quickly overheat.
but if using 'flash' while dip are on both do light

many modern lighting systems keep dip on with main. (I think primarily because they can take a bit of time to light after being turned on)

sides should remain on if any lights are used. (drl is different again!)

Thanks, I was starting to question my own sanity

B…..

Using twin filament (H4) bulbs the dips need to go off when the main beam comes on, otherwise the bulb overheats and won't last long. For headlight flash it doesn't matter as both filaments won't be on for long enough.