Features of lamps for weathering test machine.
|Lamp type||Mechanism||Characteristic of spectral distribution||Standard related to plastics|
|Xenon arc||Light by passing electricity through ionized Xenon gas in glass tube||Extremely resembling sunlight in UV and visible part||ISO 4892-2 (same as JIS K7350-2) |
|Open flame carbon arc||Carbon arc in open air||Resembling sunlight UV-B (280–315 nm) and severalfold intensity in UV-A (315–400 nm)||ISO 4892-4 (same as JIS K7350-4) |
|Ultraviolet carbon arc||Carbon arc in glass tube||Major peak at 388 nm, minor peaks at 358 and 415 nm||JIS B7751 , ASTM D5031 |
|Metal halide lamp||Light by passing electricity through ionized mercury and metal halide gases in quartz glass tube||20–30 times UV (270–450 nm) as compared to sunlight||None|
|ISO: International Standard, JIS: Japan Industrial Standard, and ASTM: American Society for Testing and Materials.|