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See Chinese contents: GB 20054-2015 GB 20054-2015: Minimum allowable values of energy efficiency and energy efficiency grades for metal-halide lamps
This Standard specifies the energy efficiency rating, energy efficiency limits, energy efficiency evaluation values, test methods and inspection rules for metal halide lamps. This Standard is applicable to transparent glass bulb scandium series metal halide lamp (single-ended 50W ~ 1500W, double-ended 70W ~ 250W), ceramic metal halide lamp (20W ~ 400W).
