[j12piprius]

I personally like very subdued lighting, if any, and the ultragauge default lighting is fine for me. Below is information from the ultragauge manual. Also, the light appears to be white, not blue.

"UltraGauge features a light sensor that is used to optionally automatically adjust the brightness of the display. During the day, the display backlight will automatically adjust to maximum brightness, and to minimum brightness for night driving. It is important that the light sensor window is not blocked as a result of installation. The light sensor port is located on the front right side of UltraGauge, as shown above (in manual). The backlighting function is fully configurable. See the backlighting section for additional details.

"When set to Automatic (the default), the backlight brightness is automatically varied according to the vehicle's inside cabin ambient light level. Ultragauge's backlight brightness increases as ambient light brightness increases. This is useful to maximize brightness and contrast during daylight hours and to minimize brightness during nighttime driving. In Automatic mode, the backlight brightness is limited to a minimum brightness and a maximum brightness, and the backlight is automatically adjusted between these limits (which you can set and adjust). The limits are set via the menu items; Backlite Min Bright and Backlite Max Bright."