Humidity Use of humidity producing materials, misting and fogging machines are prohibited. Chafing dishes are allowed for keeping food warm. Lighting All forms of natural and artificial lighting are in some way detrimental to the historical materials and artifacts which constitute the HOS structure. Please be aware of these potential dangers when coordinating activities within the structure. Ultraviolet wavelengths are present in florescent light and natural light.
Ultraviolet light causes structural damage and fading.
The effects of ultraviolet damage are cumulative and irreversible. This damage is often not visible until it is too late. Heat is produced by all forms of incandescent lighting. Heat can adversely affect painted surfaces, alter various adhesives' effectiveness, stimulate chemical reactions, and accelerate photochemical degradation in some materials. When utilizing incandescent light sources that will be producing extreme heat levels, a supplemental cooling system, such as a fan, must be provided.