directional light source definition
directional light source. (DLS) means a light source having at least 80 % of total luminous flux within a solid angle of π sr (corresponding to a cone with angle of 120°);
directional light source. (DLS) means light sources having at least 80 % light output within a solid angle of π sr (corresponding to a cone with angle of 120 °).
directional light source or DLS shall mean a light source having at least 80% light output within a solid angle of π sr (corresponding to a cone with angle of 120°). A DLS uses a reflector or an optical component (e.g. lens for LED) to align the luminous flux. All 'reflector lamps' are considered as DLS
More Definitions of directional light source
directional light source or DLS means a light source having at least 80% light output within a solid angle of π sr (corresponding to a cone with angle of 120°). A DLS uses a reflector or an optical component (e.g. lens for LED) to align the luminous flux.