Light-Tight Lux Meter Calibration Source - Labsphere

Interesting work being done at the Prairie View Observatory in Texas

Spectra-FT Fine Tunable Test and Calibration Reference Sources

Build Pictures of My 16 and 24 Homemade Integrating Spheres

Photone - Grow Light Meter

Imaging, Sensing & Remote Sensor Calibration Solutions - Labsphere

Water-Cooled High Power Calibration Source - Labsphere

FanFlex: Lightweight flexible crests and patches that fold easy. - FanTex: An all-new super comfortable soft fabric. - FanFit: The authentic on-ice

Calibrated Spectral Flux Standards

Integrating Sphere, Ulbricht Sphere

floating lumens! my integrating sphere project - Flashlight Modding and DIY Parts

Spectroradiometers Pro-Lite Technology

LuxCal250 Lux and Luminance Meter Calibration - Bentham

FanFlex: Lightweight flexible crests and patches that fold easy. - FanTex: An all-new super comfortable soft fabric. - FanFit: The authentic on-ice

Leaton Digital Luxmeter/Digital Illuminance Light Meter lux meter with LCD Display(Range: 0.1~200,000 Lux Luxmeter, 0.01~20,000Fc)

Integrating sphere #3 (portable and overly stuffed with features) - Flashlight Modding and DIY Parts

LS - FIMS Fiberoptic Illuminator Photometer