[ Focus: Training ]
Colour appearance is of key importance for supermarket applications
LED lighting should
be appropriate for the specific application
n Colour rendering (in Ra or CRI) – This is the ability of the light source to reproduce colour when the light falls upon the colour. CRI is important, so be it a tungsten halogen lamp or a low pressure sodium (SOX), it determines how well the lamp can represent the true colour as it would be seen under daylight.
A good example is street lighting. We know that
when we look at any object under natural daylight we see it as its true colour, so daylight is regarded as providing a 100 per cent colour rendition. If you were to look at the same object under a SOX lamp/ luminaire it is immediately evident that the light source does not have the same colour rendering capability. A SOX lamp has a zero colour rendering capability; yet fluorescent lamps can be obtained in a wide range of colour appearance and colour rendering capabilities, and LEDs with high CRI capacities are available for a range of applications such as spotlights, accent lights and downlights. The supermarket image on this page illustrates
how colour appearance can provide appropriate general illumination and accentuate products. The additional suspended luminaire uses a warmer white, with a high colour rendering lamp which provides an opportunity to further illuminate the products and enhance the fruit and vegetables on the shelves.
Business opportunities For retailers, lighting can have a major impact on enticing customers to buy products. But effective, energy efficient lighting has benefits for any property or area and, combined with savings in energy and bills, additional advantages like reduced maintenance costs can mean that evaluating clients’ lighting systems and, if appropriate, recommending
60 ECA Today March 2013
an energy efficient upgrade, can pay off for both contractor and client. By selecting the appropriate lamps, control gear
and new technologies, and by combining energy efficiency with effective lighting design, excellent results can be delivered, and savings compared to traditional lighting can be extremely significant on bigger lighting schemes.
Lighting can be a major part of a contractor’s business, and while understanding how to apply lighting to different applications is most important, it can often be difficult. However, contractors who understand the technology and know how to create and implement energy effective lighting specifications may find that lighting services represent a major opportunity for their business.
About Lighting Enterprises Consultancy
The LSBU distance learning course is co-written by colleagues David Matyus-Flynn, lighting design consultant and lecturer, and Kristina Allison, BA (Hons) MA AMSLL AMILP, training consultant . Matyus-Flynn has more than 35 years’ experience in the lighting
industry, providing advice to numerous clients including government departments, hotel groups, major banks and retail chains. Allison is very active in new technologies and sits on the SLL communication committee, as well as representing the SLL on the CIBSE Young Engineers Network (YEN) committee. Lighting Enterprises and Consultancy also run informative workshops, enabling contractors to successfully advise clients in order to achieve ‘Energy Effective’ lighting, reducing energy and maintenance costs and thereby reducing carbon footprint, without ever compromising the effect of the lighting.
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