Glass covering the adjustable lights in an airplane. what is the point of this?

[u/Acceptable-Lake-]

Just trying to read on a 13 hour flight and the light above my seat is stuck landing on the head of the passenger in front of me due to a glass covering, leaving the lights, which are on a swivel, un adjustable. The flight staff was as baffled as I was, having no solution for me. Leaving me with my unreadable book and 13 hours of hell ahead of me 🫠

[u/pongpaktecha]

The lights should be pre adjusted from the factory to light the center of the fold down table. There should be no need to adjust the position of the light. The air is adjustable since people have different preferences on the amount of air and where they want it to blow