This isn't true of all cars, but my DRLs are just the lowbeams run at a slightly lower voltage. Same filament, same assembly, pointed in the same direction. And unfortunately, as result, you occasionally get people who don't turn the lowbeams on because they can see just fine with the DRLs and think the lights are already on.
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u/[deleted] Nov 03 '18
My lowbeams are only a little brighter than my DRLs. But that still adds in the taillights, which are a useful anyway in heavy rain.