Light+Vocabulary

LIGHT VOCABULARY

**Accent Lighting: ** Directional lighting to emphasize a particular object or draw attention to a display item. **Ambient Lighting: **  The general lighting present in an area --excluding task lighting and accent lighting but including general lighting and daylight streaming in. = Ballast: =

==== An electrical device used with fluorescent and HID (high intensity discharge) lamps to supply sufficient voltage to start and operate the lamp but then to limit the current during operation. ====

= Bollard: =

A short, thick post with a light at its top, used for grounds and outdoor walkway lighting.

 * Bulb: **

A loose way of referring to a lamp. "Bulb" refers to the outer glass bulb containing the light source.

 Device in ballast that stores electrical energy. Often used for power factor correction and lamp regulation.
 * Capacitor: **

= Cool White: = A term loosely used to denote a color temperature of around 4100 K. The Cool White (CW) designation is used specifically for T12 and other fluorescent lamps using halophosphors and having a CRI of 62. =<span style="font-family: 'Comic Sans MS',cursive;">Quad: =

<span style="font-family: 'Comic Sans MS',cursive; font-size: 17px; line-height: 25px;">Generally refers to a compact fluorescent lamp containing 4 U-shaped tube.
=<span style="font-family: 'Comic Sans MS',cursive;">Spot: = ====<span style="font-family: 'Comic Sans MS',cursive; font-size: 17px; line-height: 25px;">A colloquial term referring to a reflector lamp with a tight beam of light, typically around 10 degrees or less. **Wavelength:** ==== <span style="font-family: 'Comic Sans MS',cursive; font-size: 17px; line-height: 25px;">The distance between two neighboring crests of a traveling wave. The wavelength of light is between 400 and 700 nanometers.