Lighting is a powerful thing. Lighting can set a mood consciously, and perhaps subconsciously too. Does anyone like the green, cold bluish look of a florescent-lit cubeland office? How about a candle-lit dinner? By a fireplace? What about a cool winter morning, or a hot summer sunset?
The color of light plays a significant role in our lives, and most of the time, we barely notice. The comely nature of incandescent light bulbs has been disappearing for years, replaced by CFLs that despite a similar color temperature, offer little of their predecessor's warmth (literally).
Enter LEDs: Energy efficient sure, but more importantly, with red, green, and blue diodes, able to generate any color imaginable. If only someone would hook one up to an app. Oh wait!