One of the oldest arguments against photography in museums, galleries and country houses is that flash photography can damage exhibits. I'm not an expert but its easy to understand that exposure to light can be damaging to delicate paper, textiles, pigments and inks. While I understand the arguments for protecting such items from the harmful impact of UV in sunlight I don't understand how flash photography can be treated as equally dangerous. Of course most modern cameras are now more than capable of capturing good images in extremely low light so a simple ban on the use of flash would both protect delicate objects and satisfy the needs of photographers.