{"L1_core": {"unit": "kelvin", "domain": "specification", "category": "color_temperature"}, "L3_technical": {"spectrum": "balanced", "standards": ["CIE_D55", "ANSI_C78.377", "ISO_3664"], "cct_kelvin": 5500, "cie_illuminant": "D55"}, "L2_specification": {"type": "color_temperature", "value": 5500, "warmth": "neutral_daylight", "appearance": "daylight_white", "applications": ["photography", "workspace", "retail"]}}