sentences:  Incandescent lights produce a large amount of heat in addition to large quantities of infrared radiation, which is likewise damaging to the fibers in antique textiles.If incandescent lights must be used, they should be placed far enough away from display cases that their heat does not affect the contents.In the case of particularly delicate textiles, display organizers might consider motion-activated or timed lighting, or lighting controlled though a visitor-activated switch, which would allow the textiles to remain in darkness when they are not under view.