A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z

A
Analogue – Refers to control signal input as found on high frequency regulating analogue ballasts
 
Architectural Dimming – Illuminating a building for aesthetic effect.  (See SceneSelect II.)

B
Ballast – Control gear found within fluorescent luminaires.  Different types: analogue, DSI, DALI
 
Bright Out – Function that determines whether the lights will switch off if the ambient level is still too bright when a regulating detector has adjusted the ballast output to minimum.

 
C
Common Zone – Common Zones are individual zones in their own right, sharing occupancy and infrared override information.  Occupancy in ordinary zones refreshes the Off Delay in all three Common Zones.  Common Zone 1 shares occupancy information beyond the local bus network to create a building-wide zone.
 

 
D
DALI (Digital Addressable Lighting Interface) – Dimmable ballast protocol which uses a digital control signal to enable specific light outputs to be maintained.  (See also ‘Regulating’.)
 
Delay – See Off Delay
 
Dimmers – See SceneSelect II
 
 
DSI – Dimmable ballast protocol used in ballasts manufactured exclusively by Tridonic.  Uses a digital control signal to enable specific light outputs to be maintained.  (See also ‘Regulating’.)


E
Emergency Lighting Testing –
 
Entry Scene – Scene which is recalled whenever an unoccupied area is entered.
 
Exit Scene – Scene which is recalled whenever an area is vacated. 
 
 
F
Fade to Off – The light output fades very slowly when the Off Delay expires.  Fade rate is approximately 4 minutes from full output to off.


G
Global Zone – Global zones provide a mechanism for special devices to address detectors in large groups without allowing the group members to communicate with each other.  Useful for functions such as load shedding.

M
Microwave – electromagnetic waves.
 
Mounting Type – serves as a support. 


O
Off Delay – the amount of time since the last observed movement before the lights will be turned off.  An Off Delay of 10 seconds is available for walk testing. 

P
PCT (Passing Cloud Timer) – A delay to prevent unnecessary switching due to short term changes in ambient light.  The Passing Cloud Timer can act as a delay when the lights are due to turn on or off (symmetrical), or only when the lights are due to turn off (asymmetrical) – i.e. the lights turn on instantly if it gets dark.

Passive Infrared (PIR) – Although passive infrared is just one of the technologies used to implement presence detection, the term PIR is often incorrectly used simply to denote a presence detector. 
 
Presence Detector – Device that detects the presence of occupants in monitored area.  Different types of presence detector (passive infrared, ultrasonic or microwave) are available for different applications.  Detectors can also be ‘stand-alone’ (LightSpot range) or ‘communicating’ (MLS Digital range).
 
Photocell – a device in which the photoelectric or photovoltaic effect or photoconductivity is used to produce a current or voltage when exposed to light or other electromagnetic radiation
 
Programmer – writing instructional programs

R
Range – Range is the same as sensitivity to movement.  In some cases, the range when the lights are ON can be programmed to be more sensitive than when the lights are OFF.
 
Regulating – Refers to ballast types which adjust light output according to a digital signal or voltage sent to them from an external device.

S
Scenes – A prospective setting
 
Sensitivity – Degree or quality of a response
 

U
Ultrasonic –Pertaining to signals, equipment, or phenomena involving frequencies just above the range of human hearing, hence above about 20,000 hertz. Also known as supersonic (deprecated usage).
 

Z
Zones – see Global Zone and Common Zone