{"id":"lighting-led-interior","version":"0.5.0","classification":{"uniformat":"D5020"},"names":["Interior lighting, LED"],"aliases":["LED fixture","light fixture","luminaire"],"service_life":{"median_years":25,"range_years":[15,30],"range_basis":"source_spread"},"pm_tasks":[{"task":"Inspect fixtures and controls for dirt, degraded lenses and faulty controls","frequency":"P6M","reference":"Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0","url":"https://www.energy.gov/sites/default/files/2020/04/f74/omguide_complete_w-eo-disclaimer.pdf","page":284,"checklist":"9.12.6 Lighting Checklist"}],"basis":[{"type":"public_document","life_type":"planning","title":"CNA e-Tool Estimated Useful Life Table","by":"U.S. Department of Housing and Urban Development","url":"https://www.hud.gov/sites/documents/eul_for_cna_e_tool.pdf","page":14,"code":"HUD CNA 3.4.4.3.3","label":"Lighting- interior common space","years":[25,30],"note":"Family properties 25 years, elderly 30. US multifamily housing. HUD's row is interior common-space lighting and does not name the lamp technology."},{"type":"public_document","life_type":"planning","title":"Purchasing Energy-Efficient Commercial and Industrial LED Luminaires (web page, modified 2025-10-30)","by":"U.S. Department of Energy, Federal Energy Management Program","url":"https://www.energy.gov/cmei/femp/purchasing-energy-efficient-commercial-and-industrial-led-luminaires","code":"Table 2 assumptions","label":"\"Lifetime Energy Cost: Calculated as the sum of the discounted value of the annual energy cost and assumed product life of 15 years.\"","years":15,"note":"Interior commercial/industrial LED luminaires (example: 2-ft. x 4-ft. LED troffer at 3,600 h/yr). Assumed life for life-cycle cost; fixture type and operating hours stated, no other basis given."}],"confidence":{"grade":"C","sample_size":null},"open_questions":["HUD's row is interior common-space lighting in general and does not name the technology; LED drivers and modules often fail before the fixture body. A source specific to LED fixtures is needed.","Every source here is a published planning, design or accounting life. None is observed replacement data."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/lighting-led-interior","versioned_url":"https://unfinished.one/c/lighting-led-interior/v/0.5.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Interior lighting, LED, v0.5.0. https://unfinished.one/c/lighting-led-interior/v/0.5.0"}