This number is one of many things that I find exciting about La Rouge.
"Light Me Up" is an old song, but for La Rouge it's been rearranged and reorchestrated. There's an acoustic-sounding piano, orchestral strings and a slower, jazzier bass. There are some momentary but interesting changes in tempo. (
Here's the original version if you want to compare.) At first listen I had a few "wait, what was that I heard" moments. But now I really love it.
I hope this and (other rearranged songs) gets released as standalone audio tracks, because it's an old song made new and fresh again. Well done, Red Velvet and SM.