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A proposed method for the calculation of light emitting diode road lighting

Light emitting diode (LED) technology creates a new opportunity for designing road lighting. Multi-source LED luminaires can be designed to make their light distribution conform to specific road layouts. However, using Standard EN 13201 to calculate LED road lighting can lead to serious errors. The proposed sub-points method is based on the same principle as Standard EN 13201 but protects against a dangerous fault. It allows one to keep the same luminance measure method of verification, giving a more accurate result but needs a different measure of luminous intensity distribution.