![]() For example, a plane rotated through 45° is indicated by C45-C225.Įxample of the light distribution curve of a direct/indirect luminaire with asymmetrical indirect component. Using the luminous intensity distribution curve, the lighting designer can assess the suitability of the luminaire for the intended purpose.įor luminaires with a highly asymmetric light distribution, it may be necessary to lay more suitable cutting planes through the luminous intensity distribution body. The C-plane system is described in EN 13032-1: 2004. The number after the “C” indicates the angle at which the plane lies when looking at the light distribution curve from above. The cutting plane in the transverse direction is indicated by (C0-C180), the cutting plane in the longitudinal direction by (C90-C270). Substituting R L from equation 1 into equation 2, we obtain the light intensity. The solid line shows the luminous intensity distribution curve in the direction transverse to the luminaire, the dashed line represents the luminous intensity distribution curve in the longitudinal direction of the luminaire. If the LDR connected to 5V through a 3.3K resistor, using the voltage divider rule, the output voltage of the LDR is. This three-dimensional contour is cut through in two vertical planes for a simple two-dimensional representation. The lighting industry measures light intensity in lumens however, we know lumens are for humans and not for plants. The distance of the contour of the luminous intensity distribution curve from the centre of the luminaire gives information about the luminous intensity in the respective direction. For each distance of the plant from the lamp, light intensity will be proportional to. The luminous intensity of the luminaire is determined by means of a goniophotometer. The light intensity is inversely proportional to the square of the distance this is the inverse square law. Here, it is assumed that the luminaire is suspended centrally in a standard room and can radiate its luminous flux freely in all directions. The luminous intensity distribution curve is a graphic representation of the luminous intensity measurement of a luminaire. Grandstands at the Vienna Harness Racing Track. ![]() ![]() IP44 / IP50 luminaires with a higher protection class. ![]()
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