Light+Vocabulary


 * Words that I didn’t know **



**AC (Alternating Current)**

Current which flows in one direction and then the other, alternately.

**Amperes ** ("Amps.") A measure of electrical current. In incandescent lamps, the current is related to voltage and power as follows: Watts (power) = Volts x Amps (current).

**Bollard** A short, thick post with a light at its top, used for grounds and outdoor walkway lighting. **Ceramic Metal Halide (CMH®) **

 A type of metal halide lamp that uses a ceramic material for the arc tube instead of glass quartz, resulting in better color rendering (>80 CRI) and improved lumen maintenance. GE ConstantColor® CMH® lamps feature a 3-piece arc tube design that delivers excellent color consistency and lamp reliability.

**Core** Component of electromagnetic ballast that is surrounded by the coil. Core is comprised of steel laminations or solid ferrite material

**Electromagnetic Spectrum** A continuum of electric and magnetic radiation that can be characterized by wavelength or frequency. Visible light encompasses a small part of the electromagnetic spectrum in the region from about 380 nanometers (violet) to 770 [|nanometers] (red) by wavelength

**Flood** Used to refer to the beam pattern of a reflector lamp, which disperses the light over a wide beam angle, typically 20 degrees or more. ("Flood" as opposed to "spot")

**Nanometer ** A unit of wavelength equal to one billionth of a meter.

**NOM **  Laboratory that sets safety standards for building materials, electrical appliances and other products for Mexico.

**Voltage** A measurement of the electromotive force in an electrical circuit or device expressed in volts. Voltage can be thought of as being analogous to the pressure in a waterline

**Wavelength ** The distance between two neighboring crests of a traveling wave. The wavelength of light is between 400 and 700 nanometers.