The conversion to LED lighting included retrofitting the enclosed refrigerated cases and changing out 150+ overhead lamps to LED PAR 38′s. The improvements were part of a larger energy savings program that Energy Smart Grocer worked with Rex on.  Energy Smart Grocer is a third party funded by PG&E, in this area, to help grocers reduce their operating costs through energy-efficient upgrades.

With six months of operating experience with the new LED lights Rex is satisfied with the results. The store and merchandise are nicely lit, the lamps have not needed replacing and he estimates they have reduced the stores electricity consumption by about 12%.

The overhead LED lamps light the main aisle that runs around the perimeter of the store.  The variety of merchandise being lit by these lamps ranges from baked goods, to packaged goods, to produce.  The amount and quality of light shows the merchandise off very well while enabling shoppers to move easily through the store.

The lighting in the center aisles of the store, while not LED, is done with crisp, efficient fluorescent T5 linear bulbs.  The lights along the perimeter work areas such as the deli and meat counter are energy efficient CFL.

Visit the store to see it in person…

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Many Hands Gallery at 510 Bay Avenue in Capitola shows a variety of artwork by local artists ranging from paintings, to pottery, to sculpture to jewelry.  The store had halogen lights in the past but the store owner wanted to reduce her lighting costs, reduce the number of times she had to change failed lamps and reduce her air conditioning load so she converted to CFL PAR38 lamps throughout most of the store.  A few halogens remain in the track lights and display cases. While the cost savings from converting to CFLs were realized, the lamps did not always bring out the best features in the displayed artwork or the store. The large emitting area of CFLs , while good at emitting a lot of light are limited in their ability to put focused light on an object.  Halogen and LED lamps however are very good at putting focused light where you need it.

She began experimenting with LED Par 38s in her track lights.  Because of the cost ~$75 each at the time, converting the whole store was unrealistic.  Because PAR38 LED lamps were screw-in compatible with her CFL track lighting experimenting with a handful of the new lights enabled here to make noticeable improvements in her store and on the displays without converting the whole store. [ Note: PAR38 LED bulbs will not be screw-in compatible with track lighting that has dimming.  LED lamps and luminaires require dimmers that are matched to the light in order to work well.]

Here she effectively uses LED lamps to subtly balance the outside light allowing the displayed objects to be seen against the strong afternoon sun coming through the windows

In addition to the ability to focus and throw the light better than CFLs, LEDs can be better at accurately rendering the colors – making them look the way they would look under incandescent lights or natural daylight.  The Many Hands Gallery has large, unobstructed windows allowing a lot of daylight into the gallery so the pieces show well because of this.  The addition of focused, broad spectrum LED light onto this painting right inside the front door however helps bring out the richness of the colors and the range of light with no glare, allowing the piece to be shown to its full potential.

Here the PAR38 LED light is used to highlight the paintings that are around a corner.  Even though it is a bright afternoon and the gallery is well lit throughout, this area seems darker by comparison.  The addition of focused light opens up the space, drawing customers to the area while showing off the paintings to full effect.

Lesson Learned:

Experimenting with a handful of lamps resulted in several well placed LED PAR38 lights that significantly improved the quality of light in the store and the artwork being displayed.  The owner is happier with the LED lamps and said that customers have commented, without knowing why, that the gallery looked lighter and better.  All this while reaping the benefits of lower electricity bills and longer lived lamps.

So How Do You Start?

While there are a ton of new LED lamps on the market there are three agencies that are doing a good job of helping you make the best choices. These organizations want you to be successful in implementing LED lighting so do take advantage of their expertise.

1) Lighting Facts at www.lightingfacts.com tests and labels LED lamps and luminaires.  Buying product with this label helps you get what you need.

A few new metrics to learn when considering LEDs are 1) Lumens – this is a measure of how much light is coming out of the lamp or luminaire 2) CRI – this is a measure of the lights ability to accurately replicate the range of colors being illuminated, using natural or incandescent light as the standard.  100 is the best. 3) CCT – this is a number that indicates how warm – reddish or cool – bluish the color coming from the light is.

A good starting point may be to get a range of CCT and CRI lamps and try them in different areas of your place and see which ones perform best in which applications.  These lights will last for years so by doing a thorough job of testing you will be rewarded with years of good lighting.

Once you have decided on the supplier, CCT, light output and CRI – file that information and use if for your subsequent purchases.  Mixing lights with different values in the same area will probably result in you being unsatisfied with the results.

2) Energy Star www.energystar.gov/productfinder

This site has a list of all the Energy Star certified lights.  For commercial applications an Energy Star certification is recommended.  This site also explains about possible rebates.  Energy Star or DLC certifications are always required to qualify for rebates.

3) Design Lights Consortium DLC www.designlights.org

This consortium keeps an updated Qualified Products List of all LED – also known as SSL (Solid State Lighting) products.

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1) The canopy lighting.  Because this is a 24 hour operation which needs to be well lit, the energy savings from LED lights is an advantage. The reliability and good color rendering are also positive attributes in this application.

2) The perimeter lighting.  The thin form factor of LED lights enables the design of compact  lights which direct the light where it is most useful.

3) The refrigerator cases.  Because LEDs operate more efficiently when they are cool this is a great application for them.  They last longer and light immediately when turned on as there is no warm-up time. In addition to the energy savings and reduced maintenance costs – the distributed point-source nature (lots of little bright lights) the merchandise sparkles more that it does under other refrigeration lighting.

The vertical strip of bluish (high color temperature) LEDs can be seen in the picture on the right, behind the Pepsi logo.

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