CCFlashLightLevel cydia tweak brings adjustable torch level using Control Center’s torch button.
Activate this tweak in Control Center.
iDevices with LED Flash included are supported.
This tweak let you adjust the LED flash light level directly from Control Center using its Torch button, this tweak extends that button, by adding a Slider for setting light level, you can activate this slider by tap and hold the button. The slider will be auto-hidden after a time fired. (You can adjust the time in Settings)
Configure from Settings.