This apps helps you to adjust your android watch Backlight.
Stay Lit:Longer Backlight for Android Wear comes in handy for you to do so, allows you to configure your watch backlight timeout once your watch display turns ON.
You can set a value for how much time will elapse from the moment that the watch has been waked from dim mode (i.e. by having tapped the screen, moved the watch, or pressed the button) to it being allowed to revert to dim mode again. You can select display timeout ranging from 15 seconds to 30 minutes.
NOTE: longer timeouts might have some impact on Battery life. 15 - 30 seconds is the recommended range.
HOW TO USE: In order to adjust the backlight timeout, open the Stay Lit:Longer Backlight for Smartwatch app on your Android Wear . This will bring up the Longer Backlight settings. Select a setting in the list by tapping on it.