Seeing the Light on LEDs

Posted by  Richard Ludlam 06-Jul-2015 01:00:00

richard-ludlam
Marketing Manager at ERIKS UK and keen follower of trends and innovations in the industrial world built from time at Fenner, FPT, WYKO and now ERIKS

ledsLEDs have made so many recent advances, Adam Hicks – Head of Procurement for ERIKS Integrated Services – called on not one, but two Lighting Engineers to cover them all in a presentation at the ERIKS and Festo Energy Conservation Operation (ECO) Event.

The latest high-quality luminaires represent an energy-efficient, environmentally friendly lighting solution which:

  • Can be 6-7 times more energy-efficient than conventional incandescent lights
  • Cuts energy use by over 80%
  • Contains no mercury so has a lower environmental impact.

These benefits go hand-in-hand with other advantages, including “instant on” to full output, wide temperature tolerance, and a maintenance-free lifespan of 50,000 hours. That’s around five times longer than a standard fluorescent tube.


The right light

Not all LEDs are the same.

Poor quality LEDs can have their service life reduced through excessive temperature in the lamp, dampness in the environment, and chemical influences from the atmosphere. However, high-quality luminaires from a reputable supplier will have efficient heat sinks built in. Dampness problems can be avoided by using the correct IP-rated fitting to provide ingress protection. Similarly, atmospheric chemical influences at some sites need to be taken into account.

However, the main point to remember is that the quality of the LEDs and their fittings will go a long way to ensuring a successful installation. 

Payback time

Not all LEDs are the same.

Poor quality LEDs can have their service life reduced through excessive temperature in the lamp, dampness in the environment, and chemical influences from the atmosphere. However, high-quality luminaires from a reputable supplier will have efficient heat sinks built in. Dampness problems can be avoided by using the correct IP-rated fitting to provide ingress protection. Similarly, atmospheric chemical influences at some sites need to be taken into account.

However, the main point to remember is that the quality of the LEDs and their fittings will go a long way to ensuring a successful installation.

Payback time

To see how your site can benefit from an upgrade to LEDs, it is worth comparing them with other lighting options in three key areas:

  1. Depreciation – or light output lost over the lifetime of the luminaire. After 20,000 hours a metal halide luminaire will provide only 40% of its original output, whereas an LED will still be providing 95%.
  2. Light Output Ratio – the efficiency of a fitting at putting its light into a usable area e.g.  the ground.
  3. Visually Effective Lumens – how bright a light appears to the eye. Sodium lights, for example, appear to give less light than LEDs.

Taking these issues into account, it is possible to calculate a typical payback period for an LED installation.

In a sample calculation based on 24/7 operation, ERIKS calculates a 48% energy saving alone, which combined with reduced maintenance costs equates to an annual saving of £22,493.45, against a project cost of £26.571.43. This results in payback in just 1.2 years, with net savings over the next 7 years of:

  • £130,882.71
  • 99 tonnes p.a. CO2
  • 135 trees

Taking control

Using the EYE-Wi wireless lighting control system to control the LEDs can lead to further savings on installation and operation costs.

For example, a recent ERIKS’ installation of luminaires would have cost £1m to install with a DALI control system. Using EYE-Wi – which needs only wiring for power to be available – the cost was just £300,000.

EYE-Wi is a future-proof control system, since PiR sensors are built into each LED. So if, for example, the configuration of an office changes and new walls are erected, there’s no need for new PiRs or rewiring. Initial installation also causes less disruption compared with a DALI system: 1 night versus 6 weeks for a recent ERIKS’ project.

Finally, EYE-Wi enables lighting systems to be self-commissioned, monitored for occupancy, and if reconfiguration is required this can be simply done from a tablet.

The end result is that LEDs with ERIKS EYE-Wi represent the lowest-cost group control system available, proved by 4 years’ worth of successful installations. 

To find out more, download the ERIKS Lighting Solutions presentation from the ECO Event here, or contact your local ERIKS Service Centre for a site visit to provide you with a bespoke LED lighting solution.

ERIKS lighting solutions

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