Lighting Fixtures

Material Composition Assumptions

The default reference product is a residential pendant or table lamp (LED-integrated) weighing approximately 2 kg, composed of:

• Metal body: Steel or aluminum frame, arm, and mounting hardware, approximately 0.8-1.2 kg. Finishes include powder coating, chrome plating, or anodizing.
• Shade/diffuser: Glass (blown or pressed), fabric over wire frame, or injection-molded polycarbonate/acrylic, approximately 0.3-0.5 kg.
• LED module: Integrated LED array on aluminum PCB with phosphor conversion, approximately 0.02-0.05 kg.
• Driver electronics: LED driver (constant-current power supply), approximately 0.05-0.1 kg. Contains transformer, capacitors, and control IC.
• Wiring and cord: Power cord with plug, internal wiring, switch, and strain relief, approximately 0.15-0.25 kg.
• Packaging: Corrugated cardboard box, EPS or molded pulp inserts, approximately 0.5-1.0 kg.

Lighting fixtures vary enormously in material composition — from a simple metal desk lamp (1 kg) to a large chandelier (20+ kg). The default represents a mid-sized residential fixture.

Manufacturing Geography

Lighting fixture production is concentrated in two main regions:

• China: Dominates global production, particularly Zhongshan (Guangdong), known as “China’s lighting capital.” Produces the vast majority of mass-market residential fixtures sold globally.
• EU: Italy (design-oriented brands), Germany (technical/architectural lighting), and Poland (cost-competitive EU production). EU production focuses on mid-to-premium segments.
• Grid intensity (China): 565 gCO2e/kWh (IEA 2024). Default for mass-market production.
• Grid intensity (Italy): ~230 gCO2e/kWh (IEA 2024). For premium/design fixtures.
• Rationale: Fixture assembly involves metalworking (stamping, bending, welding), surface finishing (plating, powder coating), and electrical assembly. Metal forming and surface treatment are the most energy-intensive factory steps. Upstream metal and glass production (Scope 3) dominates overall emissions.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
China (default)	~565 gCO2e/kWh	12.0 kgCO2e	Baseline
Poland	~640 gCO2e/kWh	12.6 kgCO2e	+5%
Germany	~350 gCO2e/kWh	10.8 kgCO2e	-10%
Italy	~230 gCO2e/kWh	10.2 kgCO2e	-15%
USA	~390 gCO2e/kWh	11.1 kgCO2e	-8%

Note: Scope 3 (upstream materials) accounts for 71% of emissions. Grid variation affects the assembly and finishing stages but has moderate overall impact.

Provenance Override Guidance

A supplier or brand may override the default CCI score by submitting:

1. Environmental Product Declaration (EPD) per EN 15804 or ISO 14025 for the specific fixture.
2. Material data: Recycled steel or aluminum content. Recycled aluminum reduces metal-stage emissions by 80-90%.
3. Factory energy data: Renewable electricity procurement, especially for metal forming and surface finishing.
4. LED module data: LED manufacturer-supplied environmental data (Signify, Osram, Cree publish sustainability reports).
5. Lightweight design: Material reduction through optimized engineering reduces proportional emissions.

Methodology Notes

• CCI score of 12 kgCO2e represents a conservative estimate for a medium residential LED fixture (~2 kg). Principi & Fioretti (2014) report 8-15 kgCO2e for LED office luminaires. The CCI score reflects mass-market Chinese production.
• Scope breakdown: Scope 3 is 71% (8.5 kgCO2e), driven by steel/aluminum production, glass or plastic shade manufacturing, and LED component production. Scope 2 is 25% (3.0 kgCO2e) from metal forming, finishing, and assembly electricity. Scope 1 is 4% (0.5 kgCO2e) from on-site thermal processes (powder coating curing ovens).
• Confidence: Low because residential lighting fixtures span an enormous range of sizes, materials, and designs. The default represents a mid-sized fixture; a small desk lamp might be 4-6 kgCO2e while a large chandelier could be 30-60 kgCO2e.
• Functional unit: One medium residential LED lighting fixture (~2 kg), cradle to gate through packaged product.
• Use-phase: Excluded but meaningful. An LED fixture consuming 10W for 4 hours/day over 15 years uses approximately 220 kWh, contributing ~50-100 kgCO2e in use-phase emissions. LED fixtures have dramatically lower use-phase emissions than incandescent or CFL equivalents.
• Data gaps: Very limited peer-reviewed LCA data specific to residential lighting fixtures. The estimate combines metal product LCA data, LED lighting studies, and USEEIO sector benchmarks.