 Continuous , short @-@ arc , high pressure xenon arc lamps have a color temperature closely approximating noon sunlight and are used in solar simulators . That is , the chromaticity of these lamps closely approximates a heated black body radiator that has a temperature close to that observed from the Sun . After they were first introduced during the 1940s , these lamps began replacing the shorter @-@ lived carbon arc lamps in movie projectors . They are employed in typical 35mm , IMAX and the new digital projectors film projection systems , automotive HID headlights , high @-@ end " tactical " flashlights and other specialized uses . These arc lamps are an excellent source of short wavelength ultraviolet radiation and they have intense emissions in the near infrared , which is used in some night vision systems . 
 Continuous , short @-@ arc , high pressure xenon arc lamps <a href='got' title='1'><mark>have</mark></a> a color temperature closely approximating noon sunlight and are used in solar simulators . That is , the chromaticity of these lamps closely <a href='uninflect' title='2'><mark>approximates</mark></a> a heated black body radiator <a href='null_relcl' title='3'><mark>that</mark></a><a href='got' title='4'><mark>has</mark></a> a temperature close to that observed from the Sun . After they <a href='uninflect' title='5'><mark>were</mark></a> first introduced during the 1940s , these lamps began replacing the shorter @-@ lived carbon arc lamps in movie projectors . They are employed in typical 35mm , IMAX and the new digital projectors film projection systems , automotive HID headlights , high @-@ end " tactical " flashlights and other specialized uses . These arc lamps <a href='drop_aux' title='6'><mark>are</mark></a>an excellent source of short wavelength ultraviolet radiation and they <a href='got' title='7'><mark>have</mark></a> intense emissions in the near infrared , which is used in some night vision systems . 
Continuous , short @-@ arc , high pressure xenon arc lamps got a color temperature closely approximating noon sunlight and r used in solar simulators . dat is , the chromaticity of dese lamps closely approximate a heated black body radiator got a temperature close to that observed from da Sun . After they was first introduced during tda1940s , these lamps began replacing the shorter @-@ lived carbon arc lamps in movie projectors . They are employed in typical 35mm , IMAX and the new digital projectors film projection systems , automotive HID headlights , high @-@ end " tactical " flashlights and other specialized uses . Tdemarc lamps an excellent source of short wavelength ultraviolet radiation and they got intense emissions in the near infrared , which is used in some night vision systems .