Upgrading Emergency Lighting to LED: Costs and Payback

Why the conversions are happening everywhere

• Battery economics: legacy 8W fluorescent units drain batteries hard — 4-yearly replacements (£15–£40/unit fitted) and the duration-test failures the testing guide describes; LED draw extends cycles and pass rates measurably
• Lamp deletion: fluorescent tubes/starters as recurring consumables disappear — sealed LED units run their lives lampless
• Self-test arrival: conversion moments add automated testing affordably (the £20–£50 option) — monthly flick-test labour automated into indicator-checking (the testing guide's economics realised)
• Brightness/compliance dividends: modern LED output mapping cleaner onto BS 5266 lux requirements — marginal legacy schemes often become compliant schemes in conversion
• Obsolescence pressure: legacy gear-tray spares thinning (the parts-drought pattern from every system's lifecycle guides) — conversions at failure become conversions by programme
• Energy trivia honestly sized: maintained-unit estates save real wattage; non-maintained estates' savings are battery-side mainly (the honest accounting)

Costs and the payback arithmetic

The worked sums: like-for-like LED swap £60–£120/fitting (unit + labour; exit boxes similar); self-test variants +£20–£50. Against running-cost deletion: battery cycles stretched (say £25/unit every 4 years becoming every 6–8), lamp/starter lines zeroed, duration-test failure remediation visits reduced (the unscheduled-attendance tax), and flick-test labour automated where self-test is taken (estates with distributed sites feel this hardest — the multi-site testing economics). Typical paybacks land 3–5 years for active estates — faster where legacy failure rates already bleed call-outs, slower for small single premises with healthy stock (where failure-point conversion is the honest advice; programmes for programmes' sake serve suppliers). Phasing logic mirrors every estate upgrade: convert worst-first (failure histories, critical routes), batch by area/visit economics, and ride other works' access (ceiling-open moments per the fit-out timing constant).

Specification and delivery notes

Buying the conversion well: like-for-like compliance verification (existing positions assumed compliant deserve the design glance — conversions inherit legacy schemes' gaps unless checked against the placement canon; cheap moment to fix spacing sins), quality tiers (established makers' sealed units with honest battery specs over bargain-bin bulkheads — the 10-year-life claims need brands that'll exist to honour them), self-test platform choice where taken (standalone self-test vs addressable/networked monitoring at estate scale — the dashboard logic from access/fire systems arriving in lighting), and certification completion (BS 5266 commissioning on converted circuits, drawings/log books updated — the paperwork that makes conversions compliance events, not just electrical ones). Delivery rhythm: conversions batch cleanly into compliance-visit calendars (our packages fold them through planned visits — fittings convert as visits pass, estates modernising without mobilisation spikes). The testing rhythm continues throughout — converted or not, the monthly/annual regime never pauses (the testing guide's drumbeat, eternal).