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Envora One Available Eleven channels · one fused IAQ score Envora Radon Coming soon Real-time radon · 0–2,000 Bq/m³
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Features Alerts, history, dashboards Developers API · MQTT · Home Assistant Envora Fleet Multi-device · org · SSO · audit
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Overview of the eleven measurements
Carbon Dioxide ppm The breath signal. How fresh is the air you are in? Carbon Monoxide ppm Low-level exposure, tracked over time. Particulate Matter µg/m³ See what you breathe. Down to one micrometre. Temperature & Humidity °C · %RH Comfort is a range, not a number. Barometric Pressure hPa Weather, altitude, storms — all in one number. VOC & IAQ Index index Every gas. Every particle. One honest score. Sound Level dBA The ambient floor, measured — never recorded. Ambient Light lx Your circadian signal, measured.
For your space
All solutions
 Home Kitchens, bedrooms, nurseries, basements. Envora shows you what you breathe — and tells you how to fix it, usually for free. Office & Co-work CO₂ is the single strongest environmental lever on office productivity — and the cheapest to fix. Envora gives facilities teams and founders the number to argue with. CO₂ and indoor air quality monitoring for schools Classroom CO₂ and indoor air quality evidence for better ventilation decisions, measurable cognitive lift, and the data trail governors and parents want. Labs & Clinics Envora One is precise enough for laboratories, clinics and regulated spaces, and comes with a signed calibration certificate per device ID. Studios & Gyms Hot yoga, spin, HIIT and small studios generate extreme humidity and CO₂ loads. Envora tells you how your ventilation is holding up — live, per-room, per-class. Podcasts & Studios Envora flags the HVAC hum, the fridge compressor, the neighbour's drill — and the concentration drift that flattens your delivery — before the tape picks any of it up. Landlords & Letting Continuous, timestamped indoor air quality records for every unit you manage — so damp disputes end in data, not arguments.
What it protects against
All protection guides
 Mould & damp risk Invisible until it is not. Allergies & dust sensitivity The 40–50% RH sweet spot. Long-term toxic gas exposure What you cannot smell, Envora can. Cooking pollution Your kitchen is an industrial chimney. Sleep & bedroom air Sleep is an environmental sport. Winter dry air Heated air is parched air. Outdoor air events When the air outside is worse than inside.
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Theme
Photopic photodiode

Ambient Light Lux

A photopic-weighted light sensor reports the level your eyes actually see — not the camera's number.

Reserve Envora One All sensors
Lux
lx
Why it matters

Your circadian signal, measured.

Light is the strongest cue your body has for day and night. Offices below 300 lx slow alertness; bedrooms above 10 lx at night disrupt melatonin. Envora draws your light day and shows you where it falls short.

How Envora measures it

Built around Photopic photodiode.

A photopic photodiode mimics the human eye's sensitivity curve. Envora samples continuously and reports both the live level and a circadian light-minutes score that compares your day to a biologically ideal one.

Ambient Light · technical
Technology
Photopic photodiode
Range
0.01 lx minimum · full daylight
Accuracy
±15% of reading (indicative)
Resolution
0.01 lx (low) · 1 lx (mid)
Response
< 200 ms
Units
lx
Dark ≤ 5 lx
Dim ≤ 100 lx
Reading ≤ 500 lx
Workspace ≤ 1000 lx
Daylight ≤ 100000 lx

Light affects you in two ways at once: visibility (lux for tasks) and circadian timing (lux at the right time of day). Bright in the morning, dim by sunset.

< 1 lx safe

Moonlight. Night-time bedroom target — under the melatonin disruption threshold.

— Wright et al., Sleep, 2013

1–10 lx safe

Bedroom after sunset. Below the level that delays sleep onset.

— Lockley & Brainard, 2013

10–30 lx note

Hallways, stairs. Above 10 lx at night begins to suppress melatonin.

— Lockley 2013

50–200 lx note

Living-room evening lighting. Casual viewing, conversation.

— EN 12464-1

300–500 lx safe

Office and home-office baseline. EN 12464-1 standard for general work.

— EN 12464-1

500–1,000 lx safe

Detail work; drawing; kitchen prep.

— EN 12464-1

1,000–2,000 lx note

High-precision tasks; classrooms; daylight near a window.

— EN 12464-1

2,000–10,000 lx note

Bright indoor daylight. Strong morning circadian wake cue.

— Wright et al., 2013

> 10,000 lx note

Direct daylight. Optimal morning light exposure for circadian alignment.

— Lucas et al., Trends Neurosci, 2014

What to do

Practical steps, not panic.

  • Aim for 1,000+ lx on your desk in the morning for a clean wake-up signal.
  • Bedrooms: under 5 lx after sunset to protect sleep onset.
  • Use the circadian score to spot dim winter weeks that drag your mood.
Protects against

Where this channel does its best work.

Sleep & bedroom air

The most important seven hours of your day happen in the room you measure the least. CO₂ triples overnight; humidity plummets; light and sound shape every sleep cycle.

Read the guide
Related sensors

Read these alongside.

dBA
Sound Level
The ambient floor, measured — never recorded.
Read
°C · %RH
Temperature & Humidity
Comfort is a range, not a number.
Read
ppm
Carbon Dioxide
The breath signal. How fresh is the air you are in?
Read
Ambient Light · on Envora One

Lux, plus 10 more channels.

Envora One ships Ambient Light alongside ten other channels, fused into one IAQ score and calibrated at our bench. £249 one-time. Free for personal households.

Reserve — £249 See all sensors

Free UK & EU shipping · 2-year warranty · 30-day returns · Reply within one UK business day.