Advance your research with LYS
LYS Button 1.0
A wearable light tracker
that puts people first
The LYS Button is pushing the frontier of research into circadian rhythms, light, and chronobiology. Used in world-leading research centers, LYS helps scientists to accurately measure people’s light exposure, chronotype, sleep patterns and movement.
Seamless, simple and
Easily clipped to everyday clothes, the LYS Button gives detailed insight into people’s light exposure throughout their day. LYS gives a more accurate picture of an individual’s true light intake.
See tech specsLearn more
Access your data anywhere, anytime
The LYS platform allows researchers to analyse their data in real-time. See aggregated analytics, keep track of participant engagement and easily export your data.
What does LYS measure?
7 days battery life on
a single charge
Water and dust resistant,
for everyday use
A reliable, valid and practical research
tool for measuring light intake
Start your research by deploying LYS Buttons to test participants. Connect the devices via Bluetooth to one of our two apps to collect your data, LYS Insight or LYS Collect.
Or connect several devices simultaneously to one phone with the LYS Collect app. Ideal for research in care homes or in facilities where not all participants have phones.
LYS App and Data Platform
Users connect their device to the LYS Insight app. A great tool for keeping participants engaged, users can identify their chronotype, record their sleep/wake up times, and review their personal light intake.
What researchers say
LYS is an innovative design which shows how the daily patterns of light influence our sleep-wake cycles in a vibrant, user-friendly visual display. Their data services provide great potential in assisting research on circadian rhythms, health and sleep in the future. It is definitely a pleasure to work with such a caring and enthusiastic team.
— Sophina Chan, Researcher,
The Hong Kong Polytechnic University
Frequently asked questions
Delivery takes up to 7 working days.
- Spectral range of the LYS Button:
LYS is an RGB sensor with a spectral range from 350-750nm.
- Intensity range of the devices have in lux:
- Units of measurement and definition metrics:
Kelvin: Colour temperature measured in Kelvin
Lux: Light intensity measured in Lux
Movement (3-axis accelerometer): Proxy for activity. Count the number of times acceleration exceeds 0.1875g (g=gravitational force) in any of the 3 axis over the logging time interval
mLux: melanopic lux, α-opic equivalent daylight (D65) illuminance with spectral age correction
The LYS Button has 18 hours of internal memory, which means that the LYS Button can be worn during a whole day without having to carry the phone. Once a day the phone should be next to the Button in order to enable data transfer.
Yes the LYS Button tracks light while charging. We recommend charging it during the night and to place to charging dock on the bedside table in order to track light while asleep.