Emergency lighting The lighting system designed to operate in the
event of power failure to facilitate the evacuation of a building, or con-
tinuation of essential services. Various methods adopted to ensure a sui-
table source of power.
Floodlighting Generally refers to the exterior lighting of a building at
night, by means of lights with controlled beams placed at a distance.
Functional lighting Lighting which is planned to provide light to
satisfy the practical needs of a space.
General Diffusing light fittings giving all round light.
Indirect Lighting provided ‘indirectly’ reflected from ceiling or wall.
Local light/task light A light fitting designed to light a specific task,
generally at individual control.
Louvres/baffles A means of shielding the light from a fitting or from
daylight, to eliminate glare. They can be fixed or moveable.
Portable light fittings Such as table and floor standards designed to
provide local light. ‘Portable’ uplights a useful addition.
Raising and lowering gear The apparatus applied to heavy ‘light fit-
tings’ in tall spaces, to allow them to be lowered for lamp change and
maintenance.
Spotlight Light fittings designed to throw light in beams of varying
width and intensity.
Suspended The pendant method of ‘hanging’ a light fitting from the
ceiling or roof.
Torchere Originally a decorative free standing ‘candle holder’; a term
sometimes applied to modern wall brackets.
Track mounted light fittings Both supported and energized, from the
numerous track systems available; giving flexibility.
Uplight Light fittings directing their light up to the ceiling providing
indirect light.
Wall washing The means of lighting by which a wall is designed to be
lit evenly; several methods can be adopted to achieve this, some more
successful than others.
- ENERGY AND CONTROLS
BEMS Building Energy Management Systems. A means of computer
control of lighting systems within a building.
Biomass A source of renewable energy which can be used in a building
for activating building services, such as ‘‘rape seed oil’’.
Control gear Discharge sources require ‘control gear’ comprising
amongst others: starters igniters transformers, capacitors, ballasts and
chokes to operate. Incandescent lamps require no gear, giving low initial
cost and making dimming simple.
Glossary 205