I am an architect who is currently putting together an adaptive reuse
report to convert a detoriated building into a museum for the ceramic
arts.  I have done some research on the need to monitor the museum
environment in order to ensure that any art collection is not harmed (i.e.
detrimental effects of light, humidity and air pollution).   However, it
is my understanding that ceramics are the more durable of art objects, and
thus require less stringent environmental control within the building.

The questions that I have are:
1) The range of light (lux or footcandles) needed for ceramic?
2) The range of humidity (what %)?
3) Any air pollutants that are harmful to ceramic (including glass)?
4) Any preventive measures for the topics above?
5) What environmental requirements are there in order to borrow pieces
from other museums?
6) Are there different requirements for international vs. national
policies?

Thank you.