On several flights at night, I found my Garmin GPSMAP 295's display didn't
dim enough to suite me, so I finally decided to try to fix the problem.

I went to a local professional photographer's store and bought a packet of
neutral density filter material for a few bucks. It had 0.3, 0.6 and 0.9
densities. The sheets are paper thin plastic. I cut pieces the size of my
GPS's display and found 0.9 ND worked perfectly.

Jon