Wednesday, February 16, 2011

Award-winning ExCeL London Exhibition & Conference Centre chooses high quality LED lighting to meet energy efficiency targets



Read the full case study here

In January 2010 Dialight’s Agent, Ocip Energy Ltd, approached the ExCeL London management team with a view to utilising LED lighting products to both reduce energy consumption and to see how they could improve their lighting in order to achieve uniformity throughout the central boulevard of the exhibition and conference centre.  At almost half a mile in length this is the main thoroughfare and public space used by all events. The solution that ExCeL chose for this critical space not only improved the light quality, but reduced operating and maintenance costs while also improving energy efficiency.

• Central boulevard almost ½ mile long
• Number of fixtures – 194
• Replaced – 400W HPS with 150W LED High Bay
• Illuminance level – moved from 100 to 220 lux
• Mounting height – 10 metres
• Energy reduction – 70%

The lighting challenge

Engineering and Energy Manager, Chris Barnes explains how the need for improved lighting came about: “During the Phase Two expansion of ExCeL we used ETFE roofing above the new section of the central boulevard to allow us to harvest a lot of daylight. The Phase One section was still lit by 400W high pressure sodium lamps which produce variable colour rendering as they age, so it looked dark by comparison. We specifically wanted to improve the lighting so that visitors could flow through the two areas without noticing a big difference in lighting conditions. Lighting is a key part of the user experience of this building and, as we couldn’t cut holes in the roof of the old section to let in daylight, it had to be an internal solution to matching the light quality.”

Additionally the ExCeL management team wanted to meet energy efficiency targets as part of their award-winning policy to continuously evolve and implement practices that deliver economic security, social and environmental benefits. A key part of this policy is to put a sustainable business strategy in place for lighting and other essential elements of its direct in-house operations.

How the challenge was overcome with LED lighting

Working closely with Ocip Energy Ltd management team and Dialight’s engineers, ExCeL London agreed to a trial of eight DuroSite™ Series LED High Bay lights from applied LED technology specialist Dialight. The 150W LED High Bays were used to replace 400W sodium lamps on a one-for-one basis and delivered more than double the lighting level taking the measured lux from 100 to 220. On the basis of this result the installation was extended to a total of 194 LED High Bay lights throughout the central boulevard.

Chris Barnes had trialled other LED lights and says: “Dialight’s High Bay suits the purpose for the building; it looks nice, it’s aesthetically pleasing, it ticks all the boxes. For example, the boulevard is a public area and when there’s a power cut the HPS can take 2-3 minutes to come back on, whereas the LED is back on instantly. Our events managers noticed that and they like it, so now there’s a push to get more LEDs installed.”
ExCeL Case Study from Dialight on Vimeo.