Philips Indoor Luminaires Indoor Furnishings User Manual


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Philips indoor luminaires Technical data 12.57
Glossary of lighting terminology
Technical data
Refractor
Optical element used to concentrate light rays to focus or improve
the direction of light. A prismatic cover is an example of a refractor.
RGB
Red, green and blue, used to specify the colors of a light source.
SDW-T
WhiteSONorSDW-Tlampsofferahighluminousefcacyin
combination with warm-white light. The color rendering is excellent.
SDW-T lamps are applied in shops and public spaces where the
atmosphere should be warm and cosy.
Sodium lamp, SON lamp
High-pressuredischargelampwithayellowishcolorappearanceand
anextremelyhighefciency.SONandSONComfortlamps,with
improved color characteristics, are mainly applied in high-bay industrial
applications.
Solid-state lighting
Description of a lighting device that does not contain moving parts
or parts that can break, rupture, shatter, leak or contaminate the
environment (such as a lamp).
Starter
Deviceforstartingadischargelamp,inparticularauorescent
lamp, that preheats the electrodes and/or causes a voltage surge in
combination with the series ballast.
Switching and dimming control
As more and more light sources can be dimmed economically,
lighting controls need to provide both switching and light regulating
capabilities.
TL5
Lineardouble-endeduorescentlampwithadiameterof16mm.
IncombinationwithOLCopticsandhigh-frequencyballaststhe
TL5 system offers a superb performance, both in terms of lighting
technology and energy consumption.
TL-D
Lineardouble-endeduorescentlampwithadiameterof26mm.
Available in a range of colors and color rendering characteristics.
Uniformity ratio
Ratiooftheminimumovertheaverageilluminanceforaspeciedarea
(E
min
/E
ave
).Whendenedassuch,theuniformityratioisalsotheratio
oftheminimumoverthemaximumilluminanceforaspeciedsurface
area (E
min
/E
max
).
Utilisation factor
Utilisation factor (UF) of a lighting installation represents the
percentageoftheluminousuxofthelamp(s)thatreachesthe
denedworkingplane.UFcanbeseenastheefciencyofthelighting
installation. UF is used to calculate the number of luminaires required.
Vertical illuminance
Illuminance incident on the vertical surface.
Unit: lux (lx) = lm/m
2
Symbol: E
vert
Visual guidance
The sum of the measures taken to give the user of a space an
unambiguous and immediately recognisable picture of the course of
the path ahead. Visual guidance is important in shops and other public
buildings. The lighting designer takes the demands for visual guidance
into consideration.
Indoor_2008_Chapter_12_LIS.indb 57 20-05-2008 14:35:50
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