We've had occasional feedback that the backlight on the Cycle Analyst can affect night vision for some people when riding in the dark. In order to accommodate those with this sensitivity, we've had the large screen LCD modules retooled to include two sets of LEDs. The standard white LED is connected by default and produces a nice and brightly backlit display. But if that is too much, then a small solder jumper to the pad labeled 'R' will illuminate a dimmer red backlight instead. This still lights up the screen at night, but with a red light that doesn't dilate the pupils.