Lux Intelligent - Knowledge Base

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How does Lux Intelligent monitor my lights?

When a Lux Intelligent system is installed, each emergency luminaire is physically monitored by the emergency lighting test panel continuously.  It does this via a PLU Module installed within each emergency luminaire, which permits the panel the monitor all aspects of the light. 

The Pulse refers to the protocol used by the panel to talk to each light fitting.  This PLU also permits the panel to force the light in to emergency operation, hence how the panel tests and communicates with each light.

Working in Unison the emergency lighting test panel and the PLU are able to report on:

  • the communication with the light, and so diagnose a fault or break in the data cable between the panel and the light
  • the light level for the luminaire in both emergency and normal operating conditions.  This is measured via a fibre optic pointed at the luminaire light source
  • the battery level to indicate a fault with the battery
  • loss of mains supply which would indicate a fault with the mains supply loop

 For more information take a look at How does the PLU Module work?.

Can Lux Intelligent monitor light levels on LED lights?

Yes Lux Intelligent can monitor the light level produced by LED emergency lights, and this is especially important with some LEDs emergency lights currently on the market.  Although all LEDs in the Lux Intelligent range are designed to provide a high light output for 50,000 hours of use, some third party LEDs can see their output decay with time. 

Also, where it is difficult to monitor a direct light out, Lux Intelligent can provide alternative interfaces to monitor other aspects of LED luminaires such as current flow.

How does Lux Intelligent monitor emergency light performance?

Lux Intelligent’s unique addressable module (PLU) design monitors the actual light output of a luminaire via a fibre optic that typically points at luminaires light source.

This light level is measured against a calibrated value established at the time of manufacture of the PLU. 

If for some reason, a light level cannot be simply monitored in this fashion, it is possible to use another means of monitoring with an alternative interface component such as a current monitor.  Again, this is uniquely calibrated to ensure that the value measured confirms if the light source is working correctly.

Why do I need an emergency light test system?

By law, emergency lighting is required within buildings that the public has access to (See What is Emergency Lighting?). It also applies to places of work. 

This is implemented through compliance to standards and codes of practice.  The standards are not just aimed at defining the design of emergency lighting, i.e. how much light and where, but it also covers the installation, commissioning and importantly, the testing of an emergency lighting installation

The codes of practice and testing requirements are outlined in BS 5266 and associate parts as well as EN50172.

How often should an Emergency Lighting system be tested?

The following minimum inspection and tests should be carried out at the intervals recommended below.

Daily Emergency Lighting Inspection

This interval specifically applies to central battery source emergency lighting systems.  In this case a visual inspection of the indicators on the central power supply to identify that the system is operational.  No test of the system operation is required.

Monthly Emergency Lighting Testing

All emergency lighting systems should be tested monthly.  This is a short functional test in accordance with BS EN 50172:2004 / BS 5266-8:2004.

The duration of the test should be sufficient to ensure that the luminaire operates correctly, whilst minimising any damage to the system components, e.g. Lamps, Battery.

It is important to note that the entire system doesn't have to be tested at the same time.  The system can be tested in sections, over a testing schedule, so long as each luminaire is tested each calendar month.

Annual Emergency Lighting Testing

The annual test should be a full rated duration test to ensure that the emergency lights are still working and producing the acceptable level of light at the end of the test.  So for example if a luminaire is rated for a 3 hour duration, then after 3 hours in an emergency situation the light should still be lit.

It is worth noting that this full duration test should be completed at a time of low risk of an emergency situation so that the batteries have sufficient time to recharge.