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What is lux testing? The complete UK guide
What is lux testing? A practical UK guide to the law, BS EN 12464-1:2021 levels, the test process, cost and how often to test. Surveys in London & the South East.
Lux Survey vs Lighting Survey vs Lighting Audit: Which Do You Need?
Lux survey vs lighting survey vs light level survey vs lighting audit: what each includes, what it costs and which one UK employers and landlords really need.
Lux Survey Report Explained: What a Compliant Report Contains
What a compliant lux survey report contains: grid, meter calibration, average, minimum, uniformity and pass/fail. How UK insurers, landlords and HSE use it.
How much does lux testing cost?
Lux survey cost in the UK: fixed prices from £90, what drives the price, and how a survey compares with a lighting designer or DIY meter. London & South East.
How often should lux testing be carried out?
How often should lux testing be done? UK triggers from fit-outs and LED retrofits to complaints, plus BS 5266-1:2025 emergency lighting tests. London & South East.
Lux levels
Recommended Lux Levels UK: The BS EN 12464-1:2021 Lux Level Chart
Recommended lux levels UK chart from BS EN 12464-1:2021 for offices, schools, warehouses, retail, healthcare and car parks, with UGR and Ra. Free reference.
Light Levels in the Workplace: HSE Minimum Lux Levels and What the Law Requires
Light levels in the workplace explained: HSE HSG38 minimum lux levels, regulation 8 duties and BS EN 12464-1:2021 design values. Clear guide for UK employers.
Emergency Lighting Lux Levels: BS EN 1838:2024 and BS 5266-1:2025 Explained
Emergency lighting lux levels under BS EN 1838:2024 and BS 5266-1:2025: 1 lux escape routes, 0.5 lux open areas, 15 lux high-risk. UK survey guide.
Average lux levels: average, minimum and uniformity explained
Average lux levels explained: average vs minimum vs uniformity (Uo), with BS EN 12464-1:2021 and HSE figures by industry, from London & South East lux surveyors.
Measurement
What is a lux meter and how does it work?
How does a lux meter work? Cosine and V(λ) correction, DIN 5032-7 and BS 667 classes, calibration, and why phone apps fail. From UK lux surveyors in London.
How is lux measured? The BS EN 12464-1:2021 grid method
How to measure lux to BS EN 12464-1:2021: grid spacing formula, working plane heights, excluding daylight and maintained vs initial lux. From London lux surveyors.
LED upgrades and lighting problems
LED upgrades and lux levels: why a retrofit lighting survey matters
LED upgrade lux levels explained: why to survey before and after an LED retrofit, what to measure and the targets to hit. For London & South East premises.
Can an LED upgrade reduce lighting compliance?
Can an LED retrofit make lighting less compliant? Glare, UGR, uniformity and flicker issues after LED upgrades, and how London & South East sites can check.
Common commercial lighting failures (and why lux surveys fail)
Why commercial premises fail lux surveys: low averages, poor uniformity, glare and dead emergency fittings. Practical fixes for London & South East sites.
Why employees complain about workplace lighting
Why staff say workplace lighting is too bright or too dim: glare, flicker, uneven light and screen reflections. How London employers can fix them.
Does poor lighting affect productivity and wellbeing?
Does poor lighting affect productivity? How office lighting affects wellbeing, eyestrain and errors, what UK guidance says, and how London firms can check.
Lux testing across London and the South East
Polarity Lux carries out calibrated lux surveys in every London borough and across Hertfordshire, Essex, Kent, Surrey, Berkshire, Buckinghamshire, Bedfordshire, Norfolk, Suffolk and Cambridgeshire. Find your town, or book a survey for a fixed price confirmed before you commit.