Indicator brightness
Discussion
Simon_GH said:
Some cars reduce the brightness of the headlamp when that indicator is activated.
PH: Terminology matters. The headlamps are never dimmed for an indicator, what you are referring to are DRLs which on some vehicles are dimmed on the corresponding side when an indicator is activated. After the signal cancels, the DRL returns to full brightness. It's designed for conspicuity of the indicator, although some may argue that it's poor design if a DRL has to dim in order to see an indicator.
Some cars have the DRL switch to amber for the indicator, which is a different application but a similar effect; the DRL function is removed entirely while the indicator on the corresponding side is in use.
Some JLR vehicles do a similar thing on the rear with the tail lights; the tail light is extinguished when the corresponding indicator is active. I'm not a fan of this, as it means you cannot have such a vehicle lit with sidelights at night plus hazards, as the indicators overrule the sidelight circuit. If you break down at night, your vehicle isn't as well lit as a normal vehicle with normal, independant sidelight/indicator functionality.
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