Radiation apparatus

In a radiation apparatus for cosmetic, photobiological and/or photochemical purposes comprising,

• housing means having an opening therein,
• at least one ultraviolet ray source in said housing means and positioned to direct its rays toward and through said opening, said ray source comprising a mercury vapor high pressure lamp containing a metal halogen vapor which lamp produces radiation of substantial intensity in the wavelength range of 320-450 nm,
• reflector means formed of a material having a high reflectance for radiation in the wavelength range of 320-450 nm for reflecting the radiation produced by said ray source, said reflector means comprising said housing means and said material comprising polished oxidized aluminum,
• filter means for completely suppressing all short wavelength rays passing through said opening having wavelengths below approximately 320 nm, and for suppressing longer visible wavelength rays passing through said opening having wavelengths above approximately 450 nm, and
• cooling means for cooling said housing and said source during operation, said cooling means comprising ventilator means for ventilating said housing,
• the aforementioned components of said apparatus coacting in combination with each other to result in the production of radiation in the wavelength range of 320-450 nm of at least 150 W/m.sup.2.