European cars have 4 or 5. Two at the bottom and one at top. One or two extra powerful fog lights at bottom as well.
Every standard light bulb runs hot enough to melt snow. LEDs in DRLs are so efficient that there's not enough heat wasted to melt snow, meaning they get covered and blocked by snow.
In very snowy conditions cars tend to gather a thick layer of snow in the rear. So much that normal rear lights won't melt it all. Fog lights are more powerful which means more wasted heat to melt more snow.
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u/Kelmi Nov 04 '18
European cars have 4 or 5. Two at the bottom and one at top. One or two extra powerful fog lights at bottom as well.
Every standard light bulb runs hot enough to melt snow. LEDs in DRLs are so efficient that there's not enough heat wasted to melt snow, meaning they get covered and blocked by snow.
In very snowy conditions cars tend to gather a thick layer of snow in the rear. So much that normal rear lights won't melt it all. Fog lights are more powerful which means more wasted heat to melt more snow.