Patent ID: 7217009

Claim:
In a reflector-type light fixture having a reflector having a part-elliptical reflector surface having at least one focal point at which is provided at least one LED set behind a main shield that prevents light from passing directly out of the fixture through a light-output plane, the improvement wherein: a) the reflector surface is shaped as a segment of an ellipse offset from an apex point of the ellipse and adjacent the one focal point of the ellipse at which the LED is located; b) the reflector surface extends substantially parallel to a longitudinal straight line; c) a common plane is formed by the LED and a straight longitudinally extending free edge of the main shield, and also either by a straight longitudinally extending outer free edge of the reflector surface or by a longitudinally extending straight edge of a secondary shield positioned generally at the outer free edge of the reflector surface; d) the light-output plane is formed either by a portion of the common plane lying between the straight free edge of the main shield and the straight free edge of the reflector surface or by a portion of the common plane lying between the straight free edge of the main shield and the straight free edge of the secondary shield; and e) the orientation of the output angle of light cast by the LED on the reflector surface and/or the size of the output angle that is defined between a front plane extending at an angle to the light-output plane and a back plane extending away from the light-output plane, determine the position and/or the size of the effective reflector surface at the light-output plane.