{"hq_id":"hq-p-hom-000172","name":"LED Light Bulb (Blue Light, Semiconductor Materials)","category":{"primary":"household","secondary":"lighting","tags":["LED","blue light","circadian","gallium","indium","semiconductor","mercury-free"]},"product_tier":"HOM","overall_risk_level":"low","description":"LED (light-emitting diode) bulbs using gallium nitride (GaN) or indium gallium nitride (InGaN) semiconductors with phosphor conversion. Mercury-free (unlike CFLs). Primary concern is blue light emission (450-490 nm peak) affecting circadian rhythm and melatonin suppression. AMA 2016 guidance recommended limiting high-CCT (>3000K) LED streetlighting. Semiconductor materials (gallium, indium) are contained in sealed units — no consumer exposure during use.","synthesis":{"derived_risk_level":"high","synthesis_confidence":0.5,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.15,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":1,"compounds_total":1,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"sensitive_populations":"children (developing retinas), shift workers, insomnia patients","overall_risk":"low","primary_concerns":["Blue light (450-490nm) suppressing melatonin production in evening use","AMA recommended ≤3000K for outdoor LED to reduce circadian disruption","E-waste: gallium/indium semiconductor materials at end of life"],"exposure_routes":"Ocular (blue light exposure). Chemical: none during normal use (sealed semiconductor)."},"exposure":{"routes":["ocular"],"contact_types":["ocular"],"users":["adult","child"],"duration":"hours","frequency":"daily","scenarios":["Evening exposure to high-CCT LED lighting suppressing melatonin","Children's developing retinas more susceptible to blue light","Occupational: 8+ hours under cool-white LED office lighting","Consumer: zero chemical exposure (semiconductor sealed in package)"],"notes":"AMA 2016: recommended ≤3000K CCT for LED streetlights due to circadian and glare concerns. Harvard Health: blue light from LEDs at 2-3 feet is far less than sunlight — risk is overstated for general room lighting but relevant for evening use. Choose 2700K (warm white) for bedroom/evening use. Semiconductor materials are contained — no exposure pathway during normal use."},"consumer_guidance":{"usage_warning":"Choose 2700K (warm white) LEDs for bedrooms and evening living spaces. Use 4000-5000K (cool white) only for task lighting and daytime use. LEDs are mercury-free — the safest lighting technology for breakage. No chemical exposure concern during normal use.","safer_alternatives":["2700K warm white LEDs for evening (minimal blue light)","Smart LEDs with tunable color temperature (warm at night, cool by day)","LED with built-in blue light filter for evening use"],"red_flags":[{"indicator":"Aging infrastructure without inspection or testing","meaning":"Degradation increases contamination risk over time.","action":"Test or inspect per recommended schedule."}],"green_flags":[{"indicator":"NSF or third-party certification","meaning":"Independent testing for safety standards.","verification":"Check for NSF, UL, or equivalent certification marks."}],"what_to_ask":[{"question":"What certifications does this product or system carry?","why_it_matters":"Certification verifies compliance with health-based standards.","good_answer":"NSF, UL, or equivalent third-party certification.","bad_answer":"No certification or self-certified."}],"alternatives":[{"name":"2700K warm white LEDs for evening","notes":"minimal blue light"},{"name":"Smart LEDs with tunable color temperature","notes":"warm at night, cool by day"},{"name":"LED with built-in blue light filter for evening use","notes":"Alternative"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"DOE Energy Conservation Standards for Lamps","citation":"10 CFR 430","requirements":"Energy efficiency standards for general service lamps. No blue light emission limits for consumer LEDs.","compliance_status":null,"effective_date":null,"enforcing_agency":"DOE","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":[],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":true,"disposal_guidance":"E-waste recycling for LED bulbs. Safe in regular waste (no mercury) but recycling preferred for semiconductor recovery.","hazardous_waste":false,"expected_lifespan":"15-25_years"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-ino-000083","name":"Indium and Indium Tin Oxide (ITO)","role":"semiconductor","concentration_pct":"trace (sealed)"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-ino-000083","compound_name":null,"role":"semiconductor","typical_concentration":"trace (sealed)"}],"identifiers":{"common_names":["led light bulb (blue light, semiconductor materials)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"SC Johnson","manufacturer":"SC Johnson","market_position":"mass_market","notable":"Household product conglomerate"},{"brand":"Clorox","manufacturer":"Clorox","market_position":"mass_market","notable":"Household cleaning market leader"},{"brand":"3M","manufacturer":"3M","market_position":"mass_market","notable":"Home safety and maintenance products"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"DOE Energy Conservation Standards for Lamps (10 CFR 430)","jurisdiction":"USA","citation":"10 CFR 430","id":"src_d8f17307"},{"id":"src_002","type":"regulatory","title":"IARC Monograph 110: Indium, Tin, and Titanium Dioxide","year":2013,"url":"https://monographs.iarc.who.int","inherited_from_compound":"hq-c-ino-000083"},{"id":"src_001","type":"journal","title":"Indium compound-related health effects in ITO workers","authors":"Japanese occupational health studies","year":2008,"inherited_from_compound":"hq-c-ino-000083"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:25:22.042Z"}}