| Cat2 Reflector |
Category 2 reflector, used in areas of medium VDU use |
| diffuser |
the part of a luminaire that distributes the light emitted
by the lamp |
| EPOS |
Electronic Point Of Sale |
| fitting |
a luminaire without a lamp |
| fluorescent lamp |
a gas filled envelope with an internal phosphor coating incorporating
electrodes |
| halogen |
gas used in a lamps construction |
| high frequency ballast |
gear required to strike and run a fluorescent tube |
| housing |
the body of a luminaire |
| illuminance |
the luminous flux incidence (commonly "amount" of
light) |
| lamp |
any number of devices that produce illumination |
| light bulb |
commonly used term for any lamp |
| low voltage |
common term for SELV, typically 12v |
| luminaire |
the equipment containing a lamp |
| lux |
the unit of illuminance, equal to 1 lumen per m² |
| mains voltage |
common term for 240v |
| Passive Infra-Red |
typically PIR, equipment allowing the switching of circuits
upon detection of a body of heat |
| photocell |
equipment used to switch circuits at adjustable light levels |
| reflector |
the part of a luminaire which controls the light emitted by
the lamp (e.g. Cat2 reflector) |
| running gear |
equipment required to illuminate a lamp i.e. ballast, transformer |
| SELV |
Safety Extra Low Voltage, operating at 50v or less |
| switch start ballast |
gear requiring a glow-type starter switch to strike and run
a fluorescent tube |
| transformer |
equipment used to reduce mains voltage to SELV |
| tungsten |
material used in a lamps filament construction |
| VDU |
Visual Display Unit (typically a computer screen, television) |
| 1st Fix |
usually, that part of an electrical installation that is not
visible on completion |
| 2nd Fix |
usually, that part of an electrical installation that is visible
on completion |
