Lighting products

Lighting products

Industry: Lights & lighting

Add a new term

Contributors in Lighting products

Become a Contributors

Lighting products

Room cavity ratio (RCR)

Lights & lighting; Lighting products

A shape factor (for a room, etc.) used in lighting calculations. RCR = 5H (L+W) / L x W, or, alternately; RCR = (2.5) Total Wall Area / Floor Area; Where H = height, L = length and W = width of the ...

Scotopic

Lights & lighting; Lighting products

Vision where the rods of the retina are exclusively responsible for seeing, typically like the light levels in the countryside on a moonless, starlit night (See also PHOTOPIC, FOVEA, FOVEAL VISION ...

Scotopic/photopic (S/P) ratio

Lights & lighting; Lighting products

This measurement accounts for the fact that of the two light sensors in the retina, rods are more sensitive to blue light (scotopic vision) and cones to yellow light (photopic vision). The ...

Seal temperature (maximum)

Lights & lighting; Lighting products

The maximum operating temperature of the seal of the lamp in Celsius.

Self-ballasted lamps

Lights & lighting; Lighting products

A discharge lamp with an integral ballasting device allowing the lamp to be directly connected to a socket providing line voltage (See CFL).

Series lamp operation

Lights & lighting; Lighting products

Refers to ballasts that employ a single current path passing through all lamps operated by the ballast. If one lamp should fail, companion lamps operated by the same ballasts will also extinguish or ...

Source size

Lights & lighting; Lighting products

For Projection lamps, this is defined as the dimensions of the rectangular area, centred on the lamp axis, within which all luminous parts of the filament lie, when viewed perpendicular to the axis ...