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Premier Lighting Case Study: Stuart Companies LED Retrofit
Scotopic vs. Photopic Ratio
New Product Intro...ASL LED Area Light
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February 2016
Premier Lighting Case Study: Stuart Companies LED Retrofit


Goal:

As a forward-thinking, energy-conscious property management company, Stuart Companies is always looking for ways to reduce energy. With over 5000 properties, utility bills can be expensive. Although they have several newly constructed facilities, they also have many facilities that were built years ago. That means the lighting per location can and does vary. That's where Premier Lighting stepped in. As a request from Stuart Companies to improve energy efficiency, they consulted with Premier Lighting on LED solutions for their properties and in 2015 alone, they retrofitted 14 multi-housing facilities to LED.

Solution:

Premier Lighting carefully analyzed the existing lighting in 14 properties and researched the best LED solution for each. As part of our mission, we strive for the optimal and practical solution for our customers, so we only recommend what we feel is best for cost and performance. In keeping with that mission, Premier Lighting determined if new fixtures were necessary or if the existing fixtures could be retrofitted to LED in all applications and provide the result Stuart Companies was hoping for. In the 14 properties surveyed, all of the common space 24/7 lighting and outdoor lighting had reasonable LED solutions - both new fixtures and retrofit solutions that saved at least 50% in energy and improved light levels overall. 

Scotopic vs. Photopic Ratio

This article on Scotopic vs. Photopic vision is the first in a series of three that will look into how we perceive and analyze the light that we see. Human perception of any lighted environment is influenced by both Scotopic and Photopic vision. However, only Photopic vision is considered relevant to light metering.

Photopic Properties:
  • Known as light or daylight vision ("cones")
  • Peak sensitivity towards red (550 nm)
  • Higher sensitivity as the light is brighter
  • Basis for modern photometry (light metering)
Scotopic Properties:
  • Known as dark or night vision ("rods")
  • Peak sensitivity towards blue (500 nm)
  • Higher sensitivity and speed in different spectral range
  • High color temperature lamps 5000K - 7000K
While rods are known to be present with night vision, they are also active in bright light and contribute to the perception of brightness. Scotopics contribute to improved acuity although Scotopics true effects in this regard are not well defined yet. What is well-known is that higher Scotopic light sources are able to provide equivalent brightness with lower energy usage. This is how LED, despite using far less energy, has been able to match or better light output from the light sources that have preceded it, such as metal halides and halogens.
New Product Intro
Hubbell Outdoor Lighting - ASL LED Area Pole Light

Hubbell's ASL Area/Site Luminaire is designed for roadway, retail, and other area/site lighting applications. Compact design that is available in multiple LED configurations. The ASL is capable of replacing up to 400W HID luminaires. Simple install with included universal mounting block for easy pole installation. Also available with mast arm option for 2-3/8" OD roadway brackets.

Read More...

Premier Lighting stocks a complete line of commercial-grade fluorescent, halogen, HID, incandescent and LED lamps, ballasts, controls and sensors for all your daily supply needs, along with commercial-grade fixtures and replacement lenses for those special projects. Contact Premier Lighting and request your own personalized custom order form.

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