Consider a bulb's Kelvin temperature. There are two major ways to differentiate between types of light: The Kelvin temperature (this measures the warmness or the coldness of the white light spectrum) ...

Is there a sufficiently reliable way to get an acceptable measure of the actual colour temperature of the the light generated by an LED bulb, using generic hardware and/or software? Maybe there's an ...

Spring is galaxy season for many amateur astronomers. However, when looking through an eyepiece instead of a camera for astrophotography, you might think of this as the season of pale gray smudges ...