1. The case CAN NOT light up by itself, the light is come from the LED light and flashing of your iPhone and colored rim!
2. The color effect of the shell is depended on the background, for example, if you put your iPhone in a red table,the case will present red light when you have an incoming call.
3. The color you choose is the bumper color, NOT the light color !
4. You need to set a LED flashing reminding, and then the case will flicker when you has an incoming call (only in sleep state ).
*Put your iPhone in LED case
*Go to settings-general-accesibility-scrol down to hearing section and turn LED Flash for Alerts