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Topic Title: Hello world
Topic Summary: Intro so I can have a discussion on Standby Lighting
Created On: 16 June 2017 12:25 PM
Status: Read Only
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 16 June 2017 12:25 PM
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GuySMowbray

Posts: 1
Joined: 09 July 2010

Hi,

Guy here - would like to start a topic on switching standby lighting - ie battery backed non emergency lighting.
 19 June 2017 12:57 PM
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AJJewsbury

Posts: 15632
Joined: 13 August 2003

Welcome. You seem to have been approved by the moderators now, so go ahead!
- Andy.
 19 June 2017 01:16 PM
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broadgage

Posts: 2317
Joined: 07 August 2007

Standby lighting can be battery powered, but a generator is IME more common.

EMERGENCY lighting, provided to safely exit the premises is often battery powered, this is because only a limited run time is required, 3 hours in many cases, sometimes a shorter duration is acceptable.

STANDBY lighting is generally understood to be provided for the continuation of normal activities in the event of a failure of the normal lighting. The likely duration of the breakdown is unknown, but it could be a lot longer than a few hours.
This suggests the need for a generator. The fuel tank is often sized for as much as 8 hours running, and additional fuel may be stored in a bulk tank at relatively low cost.
Depending on the capacity of the generator, it should be possible to supply other loads such as lifts, air conditioning, IT equipment and so on.

I would only consider battery standby lighting for very small loads, up to perhaps 100 watts in total.
A battery to supply 100 watts for 24 hours costs only a few hundred pounds, perhaps a thousand pounds for a few days operation.
For much more than that a generator will be cheaper in capital cost, have a longer working life, and an almost unlimited run time if fuel is stored or can be obtained.
 20 June 2017 10:29 PM
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MWalker86

Posts: 81
Joined: 05 June 2017

What was it specifically about standby lighting you wish to discuss?
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