Energy Efficient Lighting

TAG | led lighting controls

Jun/16

3

Thorn Retrofit at Bracknell Forest Council Offices

Comments off · Posted by admin in LED, LED panels

The Time Square office building in Bracknell is home to Bracknell Forest Council. The building is typical of many UK office blocks and required a complete refurbishment, including a lighting upgrade.

 

The old lighting comprised 1x58W switchstart luminaires with cat 2 louvres arranged in rows within a metal plank ceiling across the office space. The luminaire design combined with old technology meant the ceiling and walls appeared very dark, creating a gloomy effect below the optimum lighting specification for offices.

 
Two schemes were put forward for consideration: 1x55W TC-L with high frequency dimmable
control gear and 1x42W LED with dimmable gear. The latter scheme was chosen with the contemporary recessed Quattro LED luminaire because it offered maximum energy savings. In comparison to the existing 1x58W switchstart luminaire, Quattro LED offered a 37% energy saving on connected load. Significantly, over a 12-year period, Quattro LED also offered an energy and maintenance saving of £45,543 compared to the fluorescent alternative.

Lighting controls further increase energy savings
Part of the upgrade also included the installation of daylight and presence lighting controls using Sensa Link to ensure the lighting uses the minimum amount of energy required to meet the new design specification. The new lighting levels have been designed to achieve 450 lux on the working plane with sensors programmed to dim the lights in groups according to daylight and occupancy. With the inclusion of lighting controls, lighting is only used when required, increasing the energy savings over and above the 37% achieved by upgrading to LED.

 

Comfortable lighting fit for the environment
The office lighting has been brought up to the latest lighting standards to support the wide variety of
office-based tasks. With excellent colour rendition and superb light quality, the Quattro LED luminaires have transformed the working environment into a bright, vibrant space. The office is now a comfortable place to work, facilitating everyday tasks such as reading, writing and working with a computer screen, as well as clear communication between people As well as the lighting technology upgrade, the office has also been redecorated. This has increased the reflected light within the space and in turn creates further energy savings.

As part of the refurbishment, the emergency lighting has also been upgraded to LED using the Thorn Voyager LED series range. The addition of Explorer emergency lighting controls give a central emergency testing facility across the building.

Controls used

Sensa Link controls
Explorer emergency controls
Key Facts

Energy consumption reduced by 37%
450 lux
Colour rendition: Ra80

Visit www.novelenergylighting.com to explore our range of Thorn LED Lighting, or call us to discuss project specification and pricing.
T: 0208-540-8287
E: sales@novelenergylighting.com

· · · · · · · · · ·

Sep/14

18

Facility managers: ‘LEDs top all energy efficiency measures’

Comments off · Posted by admin in LED, LED downlights, LED panels

Lux Magazine reports: Let’s say you’re in charge of energy use at the company and you want to take big steps to slash the bill. Who you gonna call? A building insulator? A smart meter salesman? The most common answer is….

 ‘An LED vendor.’

 That’s according to a poll of over 100 UK energy professionals in the public and private sector by Energy Live News (ELN), which asked them to name which measures they took over the last year, and which ones they are planning.

 ‘LEDs were the most popular choice for energy professionals to save energy over the last year – and they look set to remain favourites for the next 12 months,’ the website reported.

 83 percent of respondents said they tapped LED lighting over the last year, and 80 percent said they’ll bring in LEDs over the next 12 months.

 The number-two measure both for last year and the upcoming one didn’t even involve outright product purchases, as managers reported that ‘changing culture and behaviour’ was also high on their list (in other words, remember to turn off the efficient new LEDs).

 The poll did not specifically ask about new boilers, solar panel installations or building managemet systems, although those did receive write-in votes.

 ‘Insulation, variable speed drives, AMT or smart meters and energy management systems tied third, each being installed over the last year by around two fifths of energy professionals,’ ELN wrote.

 As popular as LEDs were among respondents, they elicited some reality checks from ELN readers in the website’s comments section.

 ‘When it comes to lighting LED is not quite the panacea for all ills it’s set up to be,’ wrote one.

 ‘Manufacturers are making grandiose claims about the longevity of these fittings without the evidence to back them up – the technology is so new there just haven’t been the number of hours in a year to claim they’ll last 100,000 hours or whatever they claim.’

 To that, another reader shot back, ‘Have you not heard of accelerated testing?’ One fan of LEDs commented that it might still be too early to splash out for them.

 ‘Buying LED today may not be the best option,’ he said. ‘It might be better to wait a few years when efficacies will be even higher, as in many applications they have the potential to last 20-30 years and in that situation you may be better off with an optimised package that will go the distance.
’

 In a cautionary tale, he added, ‘A lot of LED packages are poorly selected/sold and they will be replaced a lot earlier than hoped for.
’

 Poorly sold? Hmmmm. Sounds like the poll needs a subcateory: Changing the culture and behaviour of vendors.

—

Photo: To avoid this sort of utility bill shock, energy managers are turning to LEDs more than anything. Image is from Shutterstock

· · · · · · · ·