device producing a light beam primarily in the 380 nm to 515 nm region, intended for chairside use in polymerizing polymer-based filling, restorative and luting materials

battery which at the beginning of the testing is 100 % of the first full charge

quotient of the radiant flux incident on an element of the surface containing the point, by the area of the element

semiconductor-based light emitting lamps

quotient of the radiant flux leaving an element of the surface containing the point, by the area of the element

power emitted, transmitted or received in the form of radiation