{"L1_core": {"domain": "optics", "category": "diffuser", "entity_type": "component", "subcategory": "opal"}, "L2_optics": {"haze_pct": [90, 99], "material": ["PMMA", "PC"], "appearance": "milky_white_uniform", "properties": ["max_diffusion", "hides_LED_dots", "excellent_uniformity", "glare_reduction"], "transmission_pct": [45, 55]}, "L5_metadata": {"updated": "2026-01-02", "version": "2.0"}, "L3_relations": {"parent": "dfs"}}