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surfisup1000:Ge0rge:
The vehicle inspection requirements for NZ state that directional lights must be:
1)bright enough to be visible from 100m in normal daylight and from 200m in normal darkness, and
2)not be too bright that cause significant dazzle to other road users.
(amongst a few other things)
Yes, but, sometimes the closer you are to the vehicle the harder it is to see the indicator lamp -- i think due to the light being reflected off internal surfaces -- they are like indicator lamp 'blind spots' . Never noticed on the older vehicles as they have fairly flat uniformly rounded lamp cover assemblies. Some of todays lamp assemblies look like stealth bombers.
It would be difficult for an inspector to check all angles of approach and distance.
The VIRM actually states what angles the light must be visible from, what colours are allowed, how many, and from what distance.
http://vehicleinspection.nzta.govt.nz/virms/in-service-wof-and-cof/general/lighting
I've linked to the lighting page in general, but 4-5 will take you to direction lights if you feel the desire to have a look yourself. Just be aware it's written from the point of what constitutes a fail for inspection - it can catch people out sometimes.
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