A natural history museum contains several displays of wild animals  These displays are created by drying and mounting animal skins  In some of the older displays, the animals' skins have started to deteriorate because of low humidity and the heat of the lights  The older displays are lit by tungsten lamps but the newer ones are lit by compact fluorescent lamps designed for use in museums
These lamps give off as much light as the tungsten lamps but less heat
The displays that are lit by many compact fluorescent lamps are more prone to deterioration than the displays that are lit by a few tungsten lamps.