Because the energy from fluorescent lamps, visible light, and sunlight causes chemical changes that result in weakening, embrittlement, darkening, or fading of museum objects, conservation lighting is a specialty that is extremely important to their preservation. 

Some materials such as paper and textiles are highly sensitive to light; they are exhibited at 5 footcandles. Materials such as metals and ceramics are safe at higher levels. They can be exhibited at 20 footcandles. Specialists must work within these limitations to light exhibits in a way that complement the objects and allow the public to see them clearly.

(Left) The Flock Room before lighting upgrades appears dark due to uneven lighting. (Right) The Flock Room after lighting upgrades is evenly lit by a system that allows lights to be set at different levels that enhance both guest viewing and preservation.