Hi - on a related note, I had 2 gigs recently in places that were fairly similar. They were in places with fairly low ceilings (about 9'), lots of those big fluorescent lights all over the ceiling, and one switch that turned on/off ALL of those fluorescent lights at the same time.
So, I could not turn off the lights. I had a hard time in both places with bright glare from the fluorescent lights. I could see a "blurred" image of the actual fluorescent tubes on the touch screen. I was able to sort of move my whole rig a bit to reduce how much of the light reflected, but since the screen cannot tilt (unlike Tyros), it was somewhat frustrating. The ceilings had SO many of these fluorescent lights that almost no matter how I moved my rig, I saw part of one (or more) of those lights in the display.
Since these lights were overhead, I don't think a little "light shield" would have helped. I'd almost need to have put a pieces of cardboard over the light on the ceiling! Maybe I'll have to figure out how to make and bring such a light-stopper! :-)
Luckily, I use Registrations heavily, and I don't have to adjust a lot on the screen anyway, during a typical gig. I have an iPad also, for reading charts/music, but I can very easily tilt it to adjust for glare from lights etc.
Wondering if others have had this issue with indoor gigs and ceiling mounted lights?
-Jim