Monthly Archives: February 2015

LED Retrofit Kit

3 Easy Steps: Pick the Right LED Retrofit Kit vs HID / HPS

How do you choose the right LED model to retrofit HID fixtures?  How do you know X watt of LED really equals 400 watt of HID?  You need to spec the right wattage, the right product, every time.  Follow these easy steps to spec the right product every time and close more projects faster with each decision maker.

LED Retrofit Kit

LED retrofit kits replace HID and HPS lamps, but how do you chose the right model?

3 Simple Steps to Compare & Spec LED to HID Metal Halide

  1. Mean lumens of HID* x Efficiency of Fixture** = Effective Lumens
  2. Match HID fixture effective lumens with LED retrofit kit or fixture
  3. Select the matching LED retrofit kit and quote your customer

3 Simple Steps to Compare & Spec LED to HPS High Pressure Sodium

  1. Mean lumens of HPS* x Efficiency of Fixture** x 0.38 for perceived lumens = Effective (Perceived) Lumens
  2. Match HPS fixture effective lumens with LED retrofit kit or fixture
  3. Select the matching LED retrofit kit and quote your customer

Example: 250 Watt HID high bay project

250W HID = 21,250lm x 0.65 (mean lumen calculation) x 0.65 fixture efficiency = 8,978 effective lumens per fixture

Our 80 Watt LED Retrofit Kit matches perfectly to replace this 250W HID for this example.

Note: Mean lumens vary per manufacturer and each fixture has a unique efficiency value.  While many people use somewhere between .6~.7 efficiency for high bays and .65 to .7 for shoebox fixtures – much higher efficiency reflectors exist.  The above is only an example and exact data is available with each respective fixture.

For many lighting projects, specking the right LED retrofit solution replacing metal halide HID is this simple.  For more detailed comparisons, Green Lighting LED has IES files and can run photometric layouts as a free service for any energy saving project.

One City’s use of LED lighting turns a bridge into more than a means of getting from one side of the river to the other.

If it looks like a duck and quacks like a duck, it must be a duck. We have all heard that old saying a time or two…right?
Well, how about this Pawtucket River Bridgeone? It looks like a bridge and acts like a bridge, it is just a bridge. Ok may be you haven’t heard that one before. But the citizens of the City of Pawtucket Rhode Island have.
During the 19th century, Pawtucket’s Slater’s Mill marked the birthplace of the Industrial Revolution and the bridge spanning the river became a commercial thoroughfare. Last built in 1958 the Pawtucket Bridge was becoming a safety hazard.
The people of Pawtucket wanted to do more than create a linkage over a relatively narrow New England waterway. They wanted to convey and showcase the series of extraordinary events that for centuries converged at this very spot.
From hand-hewn covered bridges to steel and concrete marvels, Rhode Islanders have long expressed pride in bridges and regard them as iconic structures.
Local and state officials worked with several companies in collaboration to build a structure that was more than just a means to allow drivers to cross the Pawtucket River on Rte. 95.
The new bridge is a beacon for Pawtucket blending with the city’s historic landscape and features enhanced lighting.
One of the brightest features of the Pawtucket River Bridge is the use of LED lighting. The obvious attention surrounding the LED lighting deals with the design aspects. The LED lighting enhances the look of the bridge and is easily changeable. Additionally there are many practical advantages of LED lighting over conventional lighting in this application and all forms of industrial, commercial and home lighting. LED lighting is much more efficient and last longer. LED lighting is eco-friendly because they do not emit any toxins or harmful UV radiation. They are flexible, durable and work well in all temperatures making LED lights a great choice for most traditional and design oriented projects.
The Pawtucket River Bridge project earned the 2013 AIA RI Honor APawtucket River Bridge2ward for Urban Design and the 2014 Illuminating Engineering Society Award of Merit and has received other recognition throughout the world.  You can learn more about this project at