Both the controller and firing modules are equipped with back-lit silicon keypads for clear visibility in night conditions. When powered on, both the controller and firing module automatically enter night mode. To change to day mode (no backlight, brighter displays), press and release the LIGHT Button on either the controller or 18M firing module.
The 18M firing module will operate actively for 3+ hours in night mode and only 5+ hours in day mode.
The 18R hand-held controller will operate for 8+ hours in night mode and only 15+ hours in day mode.
To control the default backlight brightness, hold down the Light Button. Once held, the brightness will increase or decrease to 0 or 100%. Once fully dim or fully bright, release the button and press and hold again to change brightness. Repeat until desired brightness is obtained. The default is remembered on both the controller and firing module upon power off and power on.