From their product page:
LIT is an interactive accent/mood light that is easily installed under most furniture. It’s a virtually effortless way to update or add warmth to your space.
Secured under your furniture with special LIT universal clips that work with any type of frame (wood, metal or plastic). Can also be used for back-glow on flat screen panel TVs as well as other theater/entertainment room applications.
Would you ever use these?