The standard for light measurements

Redesigned light sensors optimized for ecological, meteorological, solar energy, plant research, and underwater measurements.

A new design that builds on our 40+ years of experience producing light sensors.

Water shedding design Interchangeable heads Detachable base Multiple output signals

LI-180 Spectrometer

Record the spectral output of your light sources at the single nanometer level with dozens of variables.

Industry-leading photosynthetically active radiation measurement precision—no matter the source.

Integrates below-canopy photosynthetically active radiation measurements over a 1-meter length in µmol s^-1 m^-2.

Underwater photosynthetically active radiation measurements from all angles in one hemisphere in µmol s^-1 m^-2.

Underwater photosynthetically active radiation measurements from all directions in µmol s^-1 m^-2.

Measures global solar radiation in watts per square meter (W m^-2) for various research applications.

Measures visible light with the same sensitivity as typical the human eye in lux or lumens.

A portable read-out-device that provides instant readings from any light sensor you connect.

Adds data logging, long-term measurements, and automated calculation of daily light integral to your light management.

Track variables critical to light management, such as photosynthetically active radiation, daily light integral, and spectral composition.

Accurately assess resources to support site planning and optimization to maximize solar energy yield.

A variety of light measurement accessories for the light sensor and logging devices.