Like in a submarine or other 'night lighting' environment....the lighting dims to protect your night vision.
__________________ 2005 Corvette C6 Coupe
Magnetic Red Metallic II/Cashmere, MN6, 1SB, F55
Lingenfelter 403 Conversion, LG Pro Headers (coated), Corsa Sport Exhaust, Lingenfelter CAI, Accusump, LGM Coil-Over Suspension & Bump-Steer Kit, T1 Sway Bars, Pfadt Control Arm Bushing Kit, Elite Eng. Tunnel Plate & Oil Catch-Can, SKF Racing Hubs/Bearings, AP Racing Brakes, DRM Brake Ducts, Custom Roll Bar, Sparco Seats, Wide-Booty, CCW C10 Wheels,Setup: LG Motorsports
One of the things that's very cool about our Corvettes, though, is that the dash lights (and nav screen for those so equipped) don't just get dim when the headlights are on and bright when the headlights are off. The brightness of the dash lights is also determined by a separate ambient light sensor. If it's bright outside and the headlights are on, the dash lights will still be bright. Likewise, if it's not very bright outside, the dash lights will be dim even if it's not so dark that you need the headlights to be on. Pretty cool IMO.