Have you noticed it is the keypads you have the issues with? That they won't turn off, even in dark room? We have found that the light bleeds through from the bottom button into the light sensor, so the keypads always think there is light in the room. You'll need to modify the light sensor and put a cover on or sharpie the part of the sensor that goes into the keypad. Or do the backlight programmatically based on time of day, not ambient light