One Touch Light just require one touch on App launcher icon to get bright screen light, you don't need to taps many buttons to get light, you can instantly get light just by one touch, other features of App:
 Brightest screen light.
 One touch on App launcher icon will get you bright screen light.
 If your phone supports flash then you will have a button at middle of screen to ON/OFF LED Flash Light.
 In less effort you can get LED flash and Screen light instantly just by Launching App.