Lux meter and light logger

Measure light and know how far to trust the number.

Every reading comes with its ± error band, a clear 'not calibrated' warning until you calibrate, and the source it came from. A phone is not a laboratory instrument, and Luxwise is clear about that.

Coming soon to theApp Store Get it onGoogle Play
Live lux with ± band and rolling chart
What it does

A light meter that shows its working

Live meter

Lux or foot-candles with the ± band beside the number, a 60-second live chart, and the average, minimum and maximum. Optional smoothing by moving average or Kalman filter.

Colour temperature

An approximate colour temperature in kelvin, labelled warm, neutral or cool, for quick comparisons.

Calibration

Guided one- or two-point calibration beside a reference meter, with a profile for each phone and meter. The active profile and its date are printed on every export.

Logging with the screen off

Log every 100 ms, 1 s, 10 s or 1 minute. On Android, Luxwise reads the light sensor directly and keeps logging with the screen off, and Pro adds all-day logging with CSV export.

Room survey

With Pro, enter the room size and Luxwise lays out the measuring grid and guides you point by point, then gives the average, minimum, maximum and uniformity U₀ with a heat map.

Plant mode

With Pro, estimate PPFD and daily light integral (DLI) from lux for sunlight, white LED, fluorescent, HPS, metal halide and red/blue grow lights.

Screenshots

From live reading to finished report

Two-point calibration beside a reference meter
Two-point calibration beside a reference meter
Long logging at 1-second intervals
Long logging at 1-second intervals
Room grid survey with U₀ and heat map
Room grid survey with U₀ and heat map
PDF inspection report ready to share
PDF inspection report ready to share
PPFD and DLI estimates for six sources
PPFD and DLI estimates for six sources
Honest by design

Clear about what a phone can and cannot do

A guide, not a certificate

Room surveys compare your results with reference values commonly cited from EN 12464-1:2021, such as 500 lx and U₀ 0.60 for offices. They are a guide, never a certification.

PDF inspection reports

Pro builds a report with your project, site, logo and notes, the results, heat map, charts, every point and a signature line. It states how the readings were taken and how uncertain they are, with no fake 'certified' stamps.

Your readings stay on your phone

Readings, logs, surveys and reports stay on your phone, with no account and no analytics. Luxwise Pro is one payment with no subscription, and removes the ads.