Luminous efficacy & flux

Luminous efficacy & flux

An average LTI xenon lamp converts about 80% of the electrical power put into the lamp into radiation. The other 20% is lost through heat conduction and radiation. Of the 80% that is converted to radiation, about 60% is used in the arc itself. This means about 48% of the actual electrical input is used in the arc. LTI’s xenon lamps display high luminous efficacy; generally, the higher the lamp voltage, the higher the luminous efficacy. Electrode gap also has some effect on luminous efficacy – lamps with a longer electrode gap have a higher luminous efficacy.

When the electric current is increased, the luminous flux also increases proportionately with the current to a power of approximately one-and-a-half. The result is an increase in efficiency due to the simultaneous increase in lamp voltage.



		Luminous efficacy & flux An average LTI xenon lamp converts about 80% of the electrical power put into the lamp into radiation. The other 20% is lost through heat conduction and radiation. Of the 80% that is converted to radiation, about 60% is used in the arc itself. This means about 48% of the actual electrical input is used in the arc. LTI’s xenon lamps display high luminous efficacy; generally, the higher the lamp voltage, the higher the luminous efficacy. Electrode gap also has some effect on luminous efficacy – lamps with a longer electrode gap have a higher luminous efficacy. When the electric current is increased, the luminous flux also increases proportionately with the current to a power of approximately one-and-a-half. The result is an increase in efficiency due to the simultaneous increase in lamp voltage.