Button PRO

The LYS Button PRO is a next-generation wearable light sensor featuring 10 light channels plus a dedicated flicker-detection channel, engineered by LYS Technologies for research in chronobiology, sleep, and circadian rhythms.

Building on the original LYS Button 1.0, the Button PRO offers enhanced capabilities with 10-channel multi-spectral sensing and flicker detection, improved diffuser performance, and refined inter-device consistency. The device integrates seamlessly with LYS Collect (Android & iOS) and the LYS Research Portal, providing researchers with access to raw and processed light exposure data, including mEDI (melanopic Equivalent Daylight Illuminance) and CCT (Correlated Colour Temperature).

Product details:

● Multi-spectral sensing: 10 light channels (eight visible spectral bands, clear and
near-infrared, approx. 350–1000 nm) plus a dedicated flicker-detection channel.

● Spectral outputs: Provides calibrated channel values, mEDI and CCT.

● Diffuser: The integrated optical diffuser ensures even light collection
across all angles.

● Actigraphy: 3-axis accelerometer records movement for contextual activity
monitoring. Movement (Mvmt.) is recorded in counts. Counting rule: A count is
registered whenever acceleration exceeds 0.1875g in a 15-second sampling interval.
Counts per 15 seconds.

● Form factor: Small circular wearable with a clip-on design for flexibility in placement
(collar, pocket, lanyard).

● Station: A charging station used to supply power to the Device via a standard USB-C
adaptor. The charging station also serves to set the status of the Button (i.e., initiate
pairing mode and toggle the functionality of the glowing LED charging indicator).