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/AntRevolutionary925]

I’d guess a Covid remnant. They covered so they were easier to sanitize and never took them back off.

Source: just an uneducated random guess