If you are anything like me, you are going to use this quick way to turn on the flashlight every day.
Just long tap (press and hold) the home button below the display for a while and the LED will automatically turn on.
It will also automatically turn off if you take your finger off the button.
If you want to keep it on for a longer time, hold the button until the display goes to sleep mode. You can switch off the light by clicking the power button.