There are several variations on long arc Mercury lamps, with Wattages @
400W, 700W, 850W, 1200W, 2000W, 2500W, 3000W, 4000W and 5000W.
The two basic designs are either simple quartz burners varying in length
from 30cm to 1.495m or a quarzt burner enclosed in a glass jacket.
They are used mainly as light-printing lamps, but have other applications
such as water sterilization and irradiation of polyester lacquers containing
photosensitive additives. In the later case, the irradiation causes
polymerization to occur and results in complete hardening of the lacquer
coating within a considerably shorter time than when using other methods.
They are all listed as "high pressure", although some may be closer to
"medium pressure" depending on the application. They are operated on CWA
transformers, since their operating voltages vary from 740V to 2kV.
