[almostnormal]

Those windows are not just pieces of art to look at. They do also tint the sunlight, and with that the inside of the cathedral. The proposed new ones each use different colors, which is probably going to cause different parts to be tinted differently.

Should they indeed be replaced, it's a hardeware problem. But by adding computer controled (depeding on sunlight conditions) tinted light bulbs it can be fixed in software.