DIALux - Lighting technology: Beam spread Beam spread describes the directional characteristic of symmetrically radiating light sources, typically of reflector lamps, spots and floodlights. According to DIN 5040-4:1999-04 the beam spread [σ]
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SOLVED: For the luminaire shown in Figure Q9, determine the illuminance on a horizontal surface if the luminaire contains two LED lamps with a luminous flux of 1000 lumens at: (1) A
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