The purpose of the application; if power cut, you can lighten everywhere. You can lighten small dark place You can do colourful if you love nightlife or you go to concert, disco, party if you like eating romantic dinner with your darling, you can diffrent ambience. How to Use? White is default. When you touch screen, color is changing. If you want automatic color change; Press the "Menu" "Change Type", click on Choose "Automatic" If you want manually change; Press the "Menu" "Change Type", click on Choose "Manual"