This light does help my Gen 1 scope to see better than the Eagle Tac (which is a darn good light). The light helps and extends the range a little bit to my Gen 1. I can see brighter at 94 yards with my Gen 1 and this light vs my Gen 1 and the Eagle Tac. It does not, however, turn my Gen 1 scope into a Gen 3.
The light is much brighter with my home-made NV outfit, and has a more subtle increase in illumination and range with my Gen 1 scope.
Though I can't say for sure, I feel certain this light would definitely help a good Gen 2 scope to see well enough to make it more useable. Again, I can't say for fact, but I have that feeling based on the results it gave to my Gen 1 and to the home-made scope.
The video test I did was with the home-made night vision and not the Gen 1 scope.