KPOP Music Videos: What's Up With The Red/Blue Lights?

I've been noticing it a lot recently in music videos, and it hasn't necessarily bothered me, but I need to know I'm not the only noticing this:

Below are five music Kpop videos (plus one new Justin Bieber one because he's the one that reminded me of this weird trend) that use this cool red/blue lighting.

I'm not sure if anyone cares but I find this trend pretty interesting!

Pick your favorites in the comments!

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