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A low-cost and portable device for measuring spectrum of light source as a stimulus for the human's circadian system - ScienceDirect
Lux Meter (Light Meter) - Apps on Google Play
Spectral Light Meter | Gigahertz Optik GmbH | Nov 2019 | Photonics Spectra
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Quantum Sensors - PAR Meters | Apogee Instruments
Lux Meter PCE-CRM 40 | PCE Instruments
