The LM-200 is a professional tester specifically designed by Amprobe to accurately measure light output of the LED light sources. It has a 2000 count LCD for better output display and equipped with a ...

The LM3914 LED bar graph driver was an amazing chip back in the day. Along with the LM3915, its logarithmic cousin, these chips gave a modern look to projects, allowing dancing LEDs to stand in for a ...

Photometers or light meters are radiometers that include a filter and photodiode and responds based on the average human eye: the CIE 1924 luminosity function V λ. However, the light sensitive diode ...

[Marc] has an old Voigtländer Vito CLR film camera. The camera originally came with an analog light meter built-in. The meter consisted of a type of solar panel hooked up to a coil and a needle. As ...

San Jose, Calif. has begun installing 50 SmartPoles that integrate LTE wireless with LED street lighting. The poles will also have custom energy meters on top to monitor the electricity used by LTE ...