I fly KE ICN-ATL yearly in Y. So that's, maybe four times in two years. I've only seen mood lighting once, from ICN-ATL. I won't lie, it was exciting...since they say they have it but don't always use it. Oh, and they always use 777-300ER.

I've taken many red eyes and intra Asia flights (Manila, Saigon, Bangkok, Phuket). No mood lighting.