Shielding Angle
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The shielding angle, like the cutting angle, provides information about the visual comfort of a luminaire. It is the angle between the horizontal and a straight line that runs from the edge of the lamp to the edge of the light source. If the shielding angle is incorrect, there is a risk of so-called direct glare with direct-emitting lights because the lamp is also visible within the cut-off angle. Housing parts, slats or grids shield the lamps, thereby avoiding direct glare. Another way to suppress glare is with the darklight reflector technology. The light source sits recessed in a parabolic reflector as can be seen in the illustration on the left. An excessive brightness impression caused by a high luminance can also be reduced by placing an opal or prismatic cover or a mirror louvre in front.
