Circadian Rhythm Light Meter
No in-app products collected for this app.
| Rating | |||
|---|---|---|---|
| United States | 40%2 | 4.00 | |
| Denmark | 20%1 | 5.00 | |
| France | 20%1 | 5.00 | |
| Thailand | 20%1 | 5.00 | |
| United Arab Emirates | <1%0 | — | |
| Afghanistan | <1%0 | — | |
| Antigua And Barbuda | <1%0 | — | |
| Anguilla | <1%0 | — | |
| Albania | <1%0 | — | |
| Armenia | <1%0 | — |
Description
Support your circadian rhythm by measuring the melanopic content of your light environment!
Designed for health-conscious individuals, lighting designers, workplace wellness consultants, and anyone interested in how light affects sleep, alertness, and well-being.
WHAT IS MELANOPIC LIGHT?
Your body's internal clock — the circadian rhythm — is to a large extent regulated by specialized cells in your eyes (ipRGCs) that are sensitive to blue light around 490 nm. Traditional lux meters only measure total brightness, but not all light affects your circadian system equally. This app measures the melanopic component — the light that actually drives your body's response.
KEY METRICS
Melanopic Equivalent Daylight Illuminance (mEDI) — the primary CIE S 026 circadian metric
Melanopic Daylight Efficacy Ratio (mDER) — compare circadian effectiveness of light sources
Melanopic/Photopic Ratio (M/P) — balance between visual and circadian stimulation
Melanopic Irradiance (MI) in W/m² per CIE standard
Equivalent Melanopic Lux (EML) — for WELL Building Standard compatibility
Color Temperature (CCT) and Illuminance (lux)
KEY FEATURES
Actionable lighting recommendations based on time of day, mEDI and color temperature
Light source type selection (daylight, LED, incandescent, halogen, fluorescent)
Save measurements with timestamps and comments
Built-in calibration for optimal accuracy
Multilingual support, including english
Customizable settings
IDEAL FOR
Improving sleep quality — identify excessive evening blue light
Boosting daytime alertness — ensure sufficient melanopic light exposure
Human Centric Lighting (HCL) design and verification
WELL Building Standard compliance using EML measurements
Evaluating light therapy lamps and SAD devices
Testing blue light blocking glasses effectiveness
Research and education in circadian photobiology
THE RIGHT LIGHT AT THE RIGHT TIME
Bright, blue-rich light during the day promotes alertness and synchronizes your circadian rhythm. In the evening, reducing melanopic light allows melatonin to rise naturally, preparing your body for restful sleep.
ACCURACY
For optimal accuracy, use a common white paper when measuring. Hold it at eye level, illuminated by the light source you want to assess. Select the correct light source type for the most reliable melanopic estimates. While pre-calibrated for good results, optional calibration further enhances accuracy on your specific device.
Privacy Policy, https://contechity.com/circadian-light-meter/pp.html
End User License Agreement, https://contechity.com/circadian-light-meter/eula.html
FREE FOR A LIMITED TIME
Enjoy full functionality for a few weeks. After that, choose a one-time fee or subscription — still at a fraction of the cost of a dedicated device.
DEDICATED SUPPORT
Your feedback helps improve the app. Contact us at [email protected] for support or suggestions.
Turn your phone into a circadian light meter today and take control of your light environment.