PIC Optical Spectrum Analyser - Design for a practical working optical spectrum analyser
UV Spectral Light Meter SRI2000 Illuminance Spectrometer
SPECTRUM Lcd Quantum PAR/DLI Light Meter, For Measurement, Model Name/Number: 3415A
GL Optic Announces World's First Smart Spectrometer for Reliable Measurement of LED Luminous Flux — LED professional - LED Lighting Technology, Application Magazine
How to test LED grow light spectrum by 2013 handheld spectrometer - YouTube
Spectroscopy | PASCO
Light Meter, 0-20,000 Lux, 2 Ranges
Colour - Electromagnetic Radiation, Additive & Subtractive Mixing | Britannica
New hand-held light meter and Illuminance spectrophotometer!
Food sorting with Ushio Epitex LEDs - Ushio Europe B.V.
Light Measurement Solutions Light Meter Color Meter High Quality Light Measurement Tools