So, today I was focusing some PAR 46 cans and I got to one, flicked it on and the beam projected on the floor was a rectangle, even though all of the other par 46 cans just like it had round beams! I couldn't figure out what was going on. I looked in front of the can and there were no obstructions. Then I rotated the lamp in the can and turned it back on, and the rectangle had turned. I swapped out the lamps and the next one was also rectangular. the lamps are just regular GE par 46 lamps. Can anyone explain what is going on here?