The LED Revolution


Q: I have heard that there are tremen­dous savings available in operating costs by switching to LED lighting, and that the payback period is short. What are your recommendations for commercial LEDlighting?

A: While LED lighting has been with us over a decade, it’s widespread use in com­mercial applications is a relatively recent development. But there have been vast improvements in LED fixtures and retro-fit applications. Today’s LED fixtures have a high light output (lumens), use less power (wattage), have a higher efficiency (lumens/watt) as well as a much-expand­ed color range (Kelvin temperature) than yesterday’s fixtures. Many are also dim­mable. Because of this, LED bulbs are now one of the most cost-effective ways to save energy and money because they use as much as 80% less power. And de­pending on the application, the payback period can be amazingly short.

Since you are trading immediately low­ered operating costs for the retro-fit cost, the more often you operate your lighting, the faster the payback. The “low hang­ing fruit” for a retro-fit is any lighting that is operated continuously, such as lighting in a hospital, or for long periods of time, such as in a lobby or an airport parking lot. I have seen energy audits that demonstrate a payback in less than two years for ap­plications with this type of use.
Another advantage to LED lighting is maintenance. Because an LED light source is nowhere near as bright as an incandescent source, LED lights must be clustered to increase the lumens. On a practical level, this means that even if sev­eral of the LED elements fail, it will barely reduce the output of the individual fixture.

If you are considering an LED light­ing retro-fit, I recommend that you start with an energy audit, which will show what you are spending and what you will save. Secondly, I highly recommend an in-place testing of the fixtures that you are considering. All LED fixtures are not created equal, and especially for critical operations, you want to make sure that the lumens and color are what you expect them to be. And finally, investi­gate and compare the costs of the instal­lation. There are third-party leasing and financing arrangements that will allow you to retro-fit with a zero up-front cost, paid monthly through your savings in energy consumption.

Lighting is a very large percent­age of commercial energy consumption, typically 25% for many companies, and this can be substantially higher for of­fice or hospital use. So energy savings are significant. In addition, there are the added benefits of light control and color, reduction of maintenance, reduction of air-conditioning costs (lower heat load), possible tax benefits, and of course, contributing our part to saving the en­vironment. I believe that LED lighting will increasingly be specified for new construction, and that incandescent and fluorescent lighting will eventually be­come an outmoded technology of the past. With the proper audit, recommenda­tions, and testing, the well-demonstrated savings are absolutely available to your company today.

David G. Hunt, MCR, CCIM, SIOR is president of Hunt Corporate Services, Inc. and Hunt Construction Services, Inc., Plainview, N.Y.

Albany Airport Lighting Retrofit to Save $66,000 a Year


Albany International Airport expects to save $66,000 annually in utility costs from a lighting retrofit, The Business Review reports.

Some 1,969 fixtures are being replaced with high-efficiency LEDs in the baggage claim, third-floor terminal offices, the art and culture exhibit area, observation level, a conference room, vendor areas and restrooms.

Work is slated for completion by Feb. 22.
The Business Review says airport officials expect the project to pay for itself in five years, and save $1.2 million in 20 years.

CPS Energy Retrofits 20,000 Street Lamps to LED


LED Luminaires will replace over 20,000 high-pressure sodium (HPS) street lamps in San Antonio, Texas.
CPS Energy selected LED products that will be communications-enabled, allowing for connection to the Smart Grid and other communications technologies.
San Antonio’s pre-existing 250-watt HPS luminaires consume 310 system watts and are being replaced by LED luminaires.
Conventional HPS luminaires produce a low color rendering, which may make it difficult to discern true colors of cars or surroundings, whereas LED luminaires produce a more accurate color rendering. Additionally, LED luminaires produce superior light uniformity, which means the light is directed where it’s needed with less light loss or misdirected light and more uniform light levels with better average to minimum footcandles, as compared to HPS luminaires. The monochromatic nature of HPS also makes the ability to detect contrast difficult. This affects a driver’s ability to see small objects or obstructions on the road, which could represent a safety hazard.
The LED Luminaire is a direct replacement for high-intensity discharge (HID) lighting, such as HPS or metal-halide. The LED luminaire has a rated life of 100,000 hours L85, and the photocells have a rated life of 15 years, which means the luminaire lasts up to 5 times longer with a lower lumen depreciation than metal-halide and twice as long as high-pressure sodium products.