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As Hayland says, a very subjective topic are lights. I thought most had shutters. Basically the bulb is a single point of light, and a shutter lifts and lowers to cut off the upper part of the beam thrown to make it look dipped, and lifts to allow full beam. (I believe some cars shutters can also vary slightly as you drive along to maintain the beam level as you go over bumps and things too )
As for which bulbs, easiest is to replace like for like, so HID most likely in your case.
Then you start to look at what colour temp, measured in Kelvin. A lower value will tend to me more yellow tinted, a higher temp will tend to be more blueish tint. There is a perception that the whiter, bluer light is better, but on its own, that’s not always the case. For example, a blue tinted white light might ‘look’ brighter, but in reality may not be as intense a light as something with a yellow tint. So its not just the colour, but the actual amount of lumens of the bulb too.
And then there is also the idea that a yellower tint bulb is better in wet weather than a blue tint. REason being that the wavelengths of red/yellow are more likely to bounce back from a surface towards the bulb than a bluer wavelength which will bounce off the surface and keep going forward. Considering you want to see the road surface, you want light to bounce back towards you and not away from it. This is something I would agree with in practice having tried various tinted bulbs in old land rovers. The ‘cool’ looking blue./green tinted bulbs were in reality rubbish in the wet, where as plain normal bulbs were actually better at lighting the road surface.
I think most manufacturers make cars with 4000-4300k bulbs.
What about LED’s ? Not tried the personally. I had a mini with LED bulbs and they were very white coloured compared to the HID. I did like them, but I dont know how retrofit ones would be in the Range Rovers. V8 or else ...
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21st Jan 2023 9:34am
