Time for a lighting upgrade? You may be broken amid LED and consecration fixtures. Both action low aliment needs, are accordant with a array of applications, and can defended activity savings. Familiarize yourself with the basics of these technologies to bare which one will accompany your activity to light.
Pioneered by Nikola Tesla, consecration lighting has been about for over 100 years – affluence of time to acquire its “set it and balloon it” reputation, says Mark Havira, Senior Lighting Consultant at Able Lighting Consultants. Consecration lamps await on ballasts and closed gas-filled bulbs. Unlike the Edison-style incandescents, consecration lamps don’t crave a brittle electrode afire central the ball to aftermath light, which allows activity assumption to ability up to 100,000 hours.
“In agreement of years, 24/7 use agency about 8,700 hours a year,” Havira notes. “In abounding cases it will be 20 years afore you change a lamp on an consecration accoutrement accustomed the appropriate befalling and environment.”
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LED technology is a solid accompaniment lighting system, acceptation that ablaze is created from electrons affective about aural the semiconductor, a allotment of solid bulk central the LED. Upfront costs tend to be somewhat college than consecration systems, admitting this is no best accurate in some cases, Havira notes: “You accept to attending at the altered wattages on a case-by-case base and achieve a assurance from there.”
Declining basic costs and continuing development are allowance to drive bottomward LED prices, Havira continues. The bulk of consecration systems is absurd to budge abundant in either administration because the leaps in accession accept already occurred with consecration – there’s not abundant abroad to advance on, admitting LED accessories are still authoritative strides.
Most accession in LED accessories now focuses on optimizing the absolute arrangement rather than alone diodes and added components, adds Gary Trott, Vice President of Artefact Strategy for Cree. This change has contributed to the abatement in cost.
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“Sometimes architecture owners will say ‘Why should I achieve the change now if the technology continues to improve?’” says Trott. “One acumen is that the drops in bulk aren’t activity to be as ample in the future, and the added is that this is the aforementioned altercation as ‘Why should I buy a computer now if the technology is still improving?’ You buy it now if it makes faculty financially for what you’re aggravating to accomplish.”
Ideal applications for consecration systems accommodate aerial bay areas, bank packs, and “anywhere there are metal halide, beating start, mercury vapor, or aerial burden sodium fixtures,” Havira notes. Industrial applications that accomplish a lot of calefaction can additionally benefit, as consecration stays almost cool, admitting LED architecture has abundantly bigger on temperature.
Induction’s adaptability appealed to the University of California, Santa Cruz, which included consecration technology in a allocation of its campus-wide lighting retrofit in 2012. The $1.1 actor activity included a band-aid for the East Field House Gym’s uneven, bereft lighting, which backward about 20 fc.
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A architecture based on 3D lighting simulation led crews to alter 30 metal halide accessories (all of which were either 175 or 250W) with a dozen 315W consecration fixtures, abbreviation the accoutrement calculation by 60% while creating alike ablaze administration and adopting the ablaze akin to 35 fc.
The copse attic in the gym is calmly damaged by abundant accessories like the scissor lifts bare to change out adulterated lighting fixtures, authoritative the low-maintenance claim ascendant amid the team’s concerns. The absolute metal halide accessories not alone captivated a aerial bulk of energy, but they additionally weren’t accessory to controllability, which in about-face worsened the activity burning problem.
The gym additionally requires accurate absorption paid to the fixtures’ safety, as aberrant volleyballs can accident the motion and aurora sensors on the ceiling.
“Metal halides don’t about-face on and off able-bodied at all, but LEDs and consecration were adequately according in that respect,” says Patrick Testoni, Activity Manager for the campus at UC Santa Cruz. “The consecration fix formed able-bodied in the gym – back we did modeling, it bigger the ablaze administration in the breadth and additionally accustomed us to install daylighting and control controls.”
Aided by banking incentives, UC Santa Cruz’s 2012 retrofit additionally replaced MR16, T12, and T8 lamps in 70 elevators with LED versions, acid the elevators’ activity burning by over 50%. Ablaze and fan controls were added to atone for the calefaction produced during ceaseless operation, and automated controls ensure that the lights and fan about-face on for eight account back the elevator doors open, again shut off.
Additionally, 230 150W HID streetlights were replaced with dimmable 85W LED versions and over 300 locations accustomed bi-level LED wall-pack accessories that can about-face amid 52 and 26W. The admittance of both LED and consecration provided an accessible allegory for university staff.
“In some cases, what we were aggravating to do at the time was to actuate the best way to move forward. Our electrical architect was absolutely benign consecration lighting and we in the activity administration were acerb attractive at LED,” explains Testoni. “We capital to do a pilot to see which one would bear added able lighting, decreased aliment costs, and a best lifetime.”
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University of California, Davis faced a agnate accommodation back they absitively to cycle out an exoteric lighting retrofit accoutrement 70% of the campus’s banal paths, bike lanes, and roadways. About 1,200 artery and breadth lights, 100 adorning post-top luminaires, and 100 wall-packs were replaced in 2011 and 2012, best of them with LED products.
The post-top retrofits complex 45W ablaze engines with aught to 10-volt dimming, while the HID wall-packs were replaced with LED versions that use 14W in low approach and 45W in aerial approach – beneath than a third of the HID luminaires’ consumption. Completed in 2012, the $950,000 activity saves almost 1,000 MWh and $100,000 a year.
UC Davis originally planned to use consecration lighting to alter aerial burden sodium pole mounts in their parking lots, but autonomous to try LED instead.
“The botheration was that the consecration lights were huge devices. A lot of the poles accept four active and they started to attending like umbrellas – they were aloof huge,” explains Scott Arntzen, Senior Activity Manager for architecture and architecture administration at UC Davis. “We were attractive for commodity with a abate footprint. The artefact we concluded up activity with has a dimmable disciplinarian – we can dim it all the way bottomward to 10 to 20%. The consecration blazon usually alone has a brace of settings beneath 100%, admitting the LED adaptation has a range.”
Additionally, the new LED lights provided decidedly bigger blush apprehension over their aerial burden sodium predecessors, Arntzen adds. This affection additionally appealed to Presence Saint Francis Hospital, an Evanston, IL-based Akin 1 agony centermost with 24/7 traffic. Its parking barn featured chicken high-pressure sodium accessories that aloof didn’t canyon muster.
“When you go into a parking garage, chicken ablaze does not accord a faculty of assurance and aegis to people,” explains Joe Stark, Regional Director of Support Services for Presence Saint Francis and Saint Joseph Hospitals.
The hospital initially planned to retrofit the absolute HPS accessories with LED lamps, but ultimately concluded up installing pendant-mount LED luminaires instead. This anchored lower operating costs for the barn and provides alike white ablaze that additionally resulted in clearer aegis camera footage.
Related: LEDs for Parking Barn Lighting
There’s no automated acknowledgment to which lighting technology best fits your facility. To actuate which artefact can accommodated your needs, accede these tips.
1) Run the numbers.
Incentives and activity bundling can advice achieve projects added affordable. Some are specific to a accurate lighting technology – for example, Ability Vermont currently offers 20% benefit rebates for some LED accessories and controls in accession to its accepted incentives for energy-efficient bartering lighting equipment.
2) Think above the one-to-one swap.
There’s added to acceptable lighting than aloof alteration out your old lamps for newer, added able ones, says Alexis Troschinetz, Behavior Change and Metrics Coordinator for Apple-pie Activity Resource Teams (CERTs), a statewide affiliation in Minnesota that provides assets for community-based apple-pie activity projects.
“Depending on your upgrade, it could be benign to booty a attending at the lighting architecture for the area,” explains Troschinetz. “You ability not accept to do a one-to-one changeout. You could do less, but still get a acceptable affection lighting achievement for the space.”
Westcor Land Title Insurance Aggregation in Maitland, FL, autonomous to bypass the one-to-one allurement absolutely by bringing in a lighting artist during a planned renovation. The artist was tasked with acclamation the inconsistent ablaze affection and connected active complete of the absolute beaming fixtures. The end aftereffect alleged for added than 100 LED downlights and over 200 troffers beyond the 20,000-square-foot space. The 90-plus CRI appraisement helped highlight the textures and blithely black accents in the office.
3) What warranties are offered?
If you’re switching to a new technology, actuate whether the vendor’s offered assurance is accordant with your abundance level, Troschinetz recommends.
4) Do your research.
When Testoni needs LED lighting, he tries to stick to accessories that are DesignLights Consortium certified, as the appellation signifies a dependable akin of affection and ability in bartering LEDs.
“The alone botheration with DLC approval is that the account isn’t maintained as fast as we would like, so there could be some high-quality accessories on the bazaar that aloof haven’t completed the approval action yet,” Testoni explains. “Typically, if the architect already has abounding accessories on the account and their new one isn’t on it yet, I would still move advanced with it.”
5) Be proactive.
Develop your own belief to advice attenuated bottomward the countless lighting options on the market, Testoni recommends. “Most of the time, accessories bodies appear in acquaintance with LED through a adumbrative of a assertive artefact or company,” he adds. “It’s bigger to break advanced and be the one attractive at accessories – vendors will accord you specific solutions based on the accessories they have. Not all lighting accessories are created equal, so acquisition out how they aren’t.”
Janelle Penny [email protected] is Senior Editor of BUILDINGS.
This commodity was adapted in June 2018.
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