EMERGENCY LIGHTING MODES OF OPERATION
Maintained
An emergency luminaire in which the lamp is energized at all times.
The lamp is ON when there is power present and is ON during a power failure.
EXAMPLES: Exit signs. Single lamp fluoro battens used in plant rooms to function as both general lighting and the emergency lighting.
Non-Maintained
An emergency luminaire in which the lamp(s) are only in operation during a power fail.
EXAMPLES: Single lamp: Lifelight emergency luminaires / Twin lamp: Supalite floods, often used in factory units and only operate in the event of a power fail.
Sustained
An emergency luminaire typically containing two lamps, one of which is in operation while there is power present, and the other “non-maintained” lamp only energized during a power fail. Also known as Combined Non-Maintained.
EXAMPLES: LED TUBE or LED strip batten with separate dedicated LED emergency pod / LED Strip batten with dedicated separate internal LED`s with emergency battery back up