Story from: Powerlines
A Hawaiian Electric Company Inc., Publication
T5 HO. Sounds like a robot name straight out of a Star Wars movie. In fact, T-5’s are high output energy-saving, commercial/industrial fluorescent lamps with a broad range of applications. The “5” denotes a diameter of 5/12 of an inch. T-5 High Output (HO) lamps are superior to High Intensity Discharge (HID) lamps in terms of energy savings, life, uniformity, color rendering index, and instant on/off capability.
T-5 HO’s are great for high bay applications, as they provide great color rendition and fast restrike for use with occupancy sensors. In contrast, the T-5’s fatter (“8” denotes a diameter of 8/12 of an inch) cousin, the T-8’s are good for low bay use, office or general lighting. T-5’s are ideal for use in warehouses, retail stores, show rooms, indirect lighting applications, parking structures with high ceilings, hangars, and gymnasiums to name a few. They are even used in
aquarium lighting. The T-5 HO lamps are said to help coral and plant growth. Because T-5’s are so bright, it is hard on the eyes when looking directly at a bare T-5 lamp. T-5 and T-8 operate at nearly the same energy efficiency level, but a single four foot T-5 will use more energy than a four foot T-8. With similar efficiencies, this just means that the T-5 generates more light than a T-8.
“T-5 lamps have been around for a very long time, but the longer T-5 lamp versions have not been cost-effective until recently,” said Derrick Sonoda, HECO Efficiency Specialist.
HECO Energy$olutions immediately found an application for this technology – the Young Women’s Christian Association (YWCA) Laniakea Center gymnasium, right next to HECO’s downtown offices. The YWCA has been serving Oahu for over 103 years. The Laniakea Center is
an historical building located in the heart of downtown Honolulu and has a wonderful history. Many of us were unaware that the YWCA had a gymnasium. In fact, badminton, basketball, and volleyball, among other activities, are played there – both day and night. The gymnasium was using mercury vapor lamps. These lamps could not be instantly turned on, and the light intensity in terms of lumens/watt slowly fades over time. Oftentimes, this gradual drop in lumens escapes unnoticed until you realize that the space is poorly lit. As a technology demonstration, The Light Edge, Inc. provided the T-5 HO fixtures and electronic ballasts
through their local distributor, Peter Dawson of Sunburst Designs at a reduced cost. GE Lighting’s Glenn Sameshima donated the T-5 HO lamps, Energy Conservation Hawaii’s Darren Kimura donated half the cost of the installation, and Bank of Hawaii provided the use of a
compact hydraulic high-lift to reach the light fixtures.
The results have been positive according to Clarence Allen, YWCA’s Controller: “The basketball school groups like it better. It was difficult to replace the old mercury vapor lights. These new T-5 HO lights are more efficient and because it’s a fluorescent, it’s easy to change out.”
According to Joanne Iha, Director of Sales and Member Services, “The T-5 HO lamps provide a bright, uniform light, and there are less shadows and better illumination. There have been no complaints from our sports enthusiasts because of the bright lights.” The bottom line is that a team effort has resulted in the application of cost effective lighting technology that brightens both Clarence and Joanne’s days and provides a 52% savings in energy costs!
What is T-5 HO technology?
T-5 HO (high output) is an energy-saving, 5/8 - inch diameter fluorescent lamp with a broad range of commercial/industrial applications from task lighting to replacement for High Intensity Discharge (HID) high bay lighting.
T-5 HO lamps are superior to HID lamps for the following reasons:
• Up to 55% energy savings compared to mercury vapor lights
• Rated life of over 20,000 hour
• Output of 5,000 lumens
• 95% of initial light output maintained over the entire lamp life
• Uniform light distribution
• “Instant on” – no delay or warm-up period
• Color rendering index (CRI) of 85
T-5 HO lighting sounds interesting to you, please call us at 94-POWER, or contact:
Michael Morse
Director of Sales, The Light Edge, Inc.
(503) 924-5893
mike.morse@thelightedge.com
www.thelightedge.com
Peter Dawson
Owner, Sunburst Designs
847-1960
peter@sunburstdesigns.com
Darren Kimura
President, Energy Conservation Hawaii
839-7300
dkimura@pac-energy.com
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