I have noticed a good many NOS aftermarket glass tail light lenses for 1949 and 1950 models made by Lynx-Eye. It seems that GM/Guide and Globe/Glo-Brite only made plastic taillight lenses. Other than not being original, would the glass lens be considered an upgrade to the plastic?

NO,,,,,,,,,,,,,just the opposite.

Thank you!
I'll make sure to get the Guide or Glo-Brite plastic lenses.

I've been daily driving a rat '49 coupe for about 12 years now. I had reproduction plastic lenses in the taillights for about 9 years and they faded out to a sort of pink. I put in the lynx eye glass ones and they still look like the day I took them out of the boxes. They aren't "correct" but as far as for longevity, they are better. There again, for a restoration or one parked indoors all the time, I'd do the plastic ones, but if you leave the car outside all the time and/or daily drive it, you might consider the glass ones.