Thats heat bulbs. They literally explode, and are potentially dangerous. Another reson why the bulb need to be OUTSIDE of cages of reptiles that require high humidity and misting.pfal26 said:I can't remember where i saw this but i am looking right after i type this, but it was saying one of the light bulbs could shatter if some mist droplets touched it. Is this true i will post the link here once i find it.