Lighting Basics

In order to understand the technology that allows each lamp type to produce light, it is important to review certain basic principles. This post covers lumens, service life, foot-candles, lighting source types, beam angle and other foundations of lighting.

What is Light?  Light travels at 186,000 miles per second and is expressed in wavelengths in billionths of a meter (nanometers). This visually perceived energy is measured in the range of wavelengths from 380 nm to 780 nm, a small portion of the electromagnetic spectrum  The color temperature of the lamp and the quality of color rendering (Color Rendering Index) of different lighting sources will impact your perception of colors, as the different wavelengths are reflected off objects.   How the Eyes Work  Light from a source (sun, lamp, etc.) is reflected off an object, first entering the eyes through the...

The differences between Electronic and Magnetic Transformers and their types are explored.

LEDs require drivers for two purposes:

1. LED drivers rectifies higher voltage, alternating current to low voltage, direct current.

2. LED drivers also protect LEDs from voltage or current fluctuations.