OK, well I set mine at half - so for me (or anyone else that sets their instrument lighting <100%) it is a benefit for ambient brightness to code as above like you stated
For members with sedans only - there is a guy selling aftermarket ambient strips with what he states are much brighter LED's - but instead of white/amber as OEM, they are blue/amber
http://f30.bimmerpost.com/forums/sho....php?t=1438276
I can't attest for the quality/fitment of these - just putting it out there...