Lighting products

Lighting products

Industry: Lights & lighting

Add a new term

Contributors in Lighting products

Become a Contributors

Lighting products

Spacing to mounting height ratio

Lights & lighting; Lighting products

Ratio of fixture spacing (distance apart) to mounting height above the work plane; sometimes called spacing criterion. It is OK to have fixture spaced closer than the spacing criterion suggested by ...

Specification series (SP) colours

Lights & lighting; Lighting products

Energy-efficient, all-purpose, tri-phosphor fluorescent lamp colours that provide good colour rendering. The CRI for SP colours is 70 or above and varies by specific lamp type.

Specification series deluxe (SPX) colours

Lights & lighting; Lighting products

Energy-efficient, all-purpose, tri-phosphor fluorescent lamp colours that provide better colour rendering than Specification Series (SP) colors. The CRI for SPX colours is 80 or above and varies by ...

Spectral power distribution (SPD)

Lights & lighting; Lighting products

A graph of the radiant power emitted by a light source as a function of wavelength. SPDs provide a visual profile or "finger print" of the colour characteristics of the source throughout the visible ...

Specular reflection

Lights & lighting; Lighting products

Reflection from a smooth, shiny surface, as opposed to diffuse reflection.

Spot

Lights & lighting; Lighting products

A colloquial term referring to a reflector lamp with a tight beam of light, typically around 10 degrees or less. It comes from the fact that such a lamp produces a narrow spot of light as opposed to ...