Mine is an indoor range, with the aforementioned florescent lights above. I usually get whacked in the head with most of the ejected cases. I wear a hat.
My complaint is that although it's an enclosed range, and I police my brass before going downrange and sweep after shooting, I still lose 1 out of 5 cases...
With 9mm, it's not catastropic, as the police use the range and throw their expended ammo away. We fill a 55 gal drum with left-behind expended brass and then cart it off to the scrapyard [$$$]. I just count my cases and grab a few out of the barrel.
...But the 30 Luger/30 Mauser cases are another story. I'll spend a half hour looking for those boogers. In the end, I lose 5 or 6 out of 100...Don't know where they go...On top of the light fixtures maybe???...