{"L1_core": {"type": "tolerance_class", "domain": "specification", "category": "led_binning"}, "L3_technical": {"sdcm": 4, "standards": ["ANSI_C78.377", "SDCM", "DLC"], "macadam_steps": 4, "perceptibility": "visible_in_comparison"}, "L2_specification": {"type": "step_down_specification", "value": 4, "applications": ["industrial", "utility", "non_critical"], "tolerance_level": "relaxed"}}