Why are british street lights orange ? (why are the bulbs orange?)?

Question

Why are british street lights orange ? (why are the bulbs orange?)?

Answer 1

maybe is the best colour for them

Answer 2

Because they're sodium lights.

That's the colour the sodium glows at naturally.

I suppose the next question is why use sodium lights. They must be energy efficient but maybe someone else knows that for sure.

By the way I think orange light is horrible.

Answer 3

It was deemed as the most visible colour at night.

Answer 4

They use Sodium - its vapour is incandescent when heated. The light is orange, but cheaper than whiter light.

Answer 5

so they can be seen in fog, orange is seen better than white.. just like when playing football, in foggy weather an orange ball is used

Answer 6

They aren't all orange, it depends what gas is used in them.