NOM-031-ENER-2012: Energy efficiency of light emitting diodes (LED) for roads and public outdoor areas. Specifications and testing methods
For the Color Rendering Index (CRI): (a) the luminaires intended for street lighting must have a minimum CRI value of 67. (b) the luminaires intended for outdoor lighting must have an minimum CRI value of 70. Additionally, luminaires with LEDs must have a power factor of at least 0.90. The total harmonic distortion in electric current must be less than 20%.
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