An electric lamp in which the envelope is made of quartz, which allows ultraviolet light to pass through it. It may be a bulb containing a halogen or a tube containing mercury vapour.
Example sentencesExamples
- The cleaned and dried material is conveyed through a conduit g into an apparatus i in which it is exposed to ultra-violet rays from quartz lamps suspended at a distance of 15-30 centimetres from superimposed shaking trays k over which the material is fed in succession.
- The units typically contain battery packs with two sealed-beam or quartz lamps mounted on top.
- Heavy glass incandescent lamps and quartz lamps share some serious shortcomings.
- Small-scale pendant lights with halogen or quartz lamps are the ideal size for accent lighting.
- But the quartz lamps were strong enough to cause some committee members and spectators - and even one TV cameraman - to wear tinted glasses.