THE KNOWLEDGE
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EMERGENCY LIGHTING
A GUIDE TO EMERGENCY LIGHTING
Emergency Lighting – An Overview
System Design Guide Continued...
Lighting makes up approximately 20% of the UK’s energy consumption and non-domestic lighting shamefully accounts for approximately 24 million tonnes of CO2 per annum. As we all know, LED technology is rapidly taking over the lighting business, providing not only an attractive alternative to its conventional counterparts but also proving to provide long term savings in energy and subsequent replacement costs. In addition to energy savings, LEDs in general illumination applications provide longer operating life (in the region of up to 50,000 hours), directionality, compact size, ease of control and dimmability compared to incumbent technologies they replace.
• At each exit door intended to be used in an emergency • Near stairs so that each flight of stairs receives direct light Near any other change in level • Mandatory emergency exits and safety signs • At each change of direction • At each intersection of corridors • Outside and near to each final exit • Near first Aid Post • Near fire fighting equipment • Near escape equipment for the disabled • Near disabled refuge and call points
Contractors should be advising about the benefits of LED lighting solutions...
Exit Signage Requirements
The LED has many benefits that should be highlighted to customers during a site survey, such as:Reduced air conditioning costs as LED lights have a lower heat output LED lights last longer than conventional lighting. They create less waste and boast more easily recycled components Cost saving over a longer period of time The LED pros outweigh the cons when it comes to choosing efficient, cost effective lighting solutions for commercial, residential or industrial properties.
System Design Guide The British Standard BS5266 has been revised to conform with the European Standard EN1838 (issued in the UK under reference BS EN1838/BS5266 Part 7) which specifies luminous requirements for emergency systems installed in premises. It also now calls up the luminaire product standard BS EN60598-2-22. An escape lighting luminaire complying with EN 60598-2-22 shall be sited to provide appropriate illuminance near each exit door and at positions where it is necessary to emphasise potential danger or safety equipment. The positions to be emphasised shall include the following:
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ChannelSafety
• Safety signs shall be illuminated to at least 50% of the required luminance within 5 seconds and full required luminance within 60 seconds. • The colours shall conform to the requirements of ISO 3864. • The luminance of any area of safety colour of the sign shall be at least 2 cd/m2 in all relevant viewing directions. • The ratio of the maximum to the minimum luminance within either white or the safety colour shall be not greater than 10:1. • All signs must be of the same type within a building and not mixed For further information review the Technical Statement published by ICEL (ICEL TS03 Issue 1 – 12/12) on Emergency Exit “Clear” Signs.
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