We have a low beam in our bathroom. I have banged my head on it a number of times. I’m sure I’d get used to it - or concussion - eventually, but it’s the guest bathroom and I shouldn’t like to inflict the experience on friends.
There ie ample light in the daytime, but it would still be useful to mark it somehow. For the night-time, a battery-operated rechargeable low-power motion-sensitive light was my first idea.
Any thoughts?
A couple of strips of LED lights set to lellow and red and a sign Duck or Grouse.
A Gite I rented in Charente this summer used foam padding covered in black and yellow hazard warning tape on their beam on the upstairs landing.
I still managed to forget about it and bang my head. 
But yes maybe a motion detector light would help…
Classy 
As a big fan of fairy lights ,…,. 
In the gîte we have padded the low beam and it now has a big sticker that says AIEEEeeeee!
