Choose The Right LED For High-Bay Lighting

The high-bay lighting marketplace is becoming prepared to get a huge shift to LED technology. This has been driven from the dropping costs of LED lamps, as well as improvements in sensors and controls, which are accustomed to help further reduce energy consumption, empowering an acceptable return on investment (ROI). High- bay lighting uses in industrial and commercial environments now are nicely placed to benefit from LEDs when it comes to energy savings and minimizing downtime.
Navigant Research (Boulder, CO) predicts world-wide sales of high-bay luminaires and lamps increases through 2017, reaching nearly $17.0 billion, propelled mainly by the increasing adoption speed of more high-priced LED luminaires and lamps in new construction and retrofits.

Navigant Research points out that LED technology developments are also driving the shift, empowering LEDs to satisfy the demanding demands of illuminating these broad-area spaces “while minimizing contrast, reducing glare, as well as in several instances satisfying strict security and dangerous surroundings demands.” For illumination designers to develop the most cost effective luminaires which take advantage of LED technology, they want to pick the right emitters for the work. These LEDs have to have the ability to satisfy high-output signal lumen demands providing the correct amount of light distribution and while simplifying heat direction.

There are lots of means to incorporate LEDs into high-bay luminaire programs, and there really are quite a few factors or tradeoffs for designers which vary from thermal layouts (heatsinking) and optical control to driver choice and pricing. Designers of high-bay lighting systems might additionally desire to begin looking at including other innovative lighting controls, along with sensors, networking to price decreases and additional energy savings, but this is past the range of that which we’re investigating here. In this post we are going to take a peek at several LED options that satisfy with the functionality, in addition to provide the price savings demanded for high-bay applications.

As an ingredient of the framework, there are six essential features that designers should value when designing high-bay lighting systems. Included in these are illuminance distribution (footcandles [fc]/lux), electrical power (watts), life (hours), payback (months), luminous flux (lumens), and manufacturability. Other significant features include operating temperature, operating humidity (percentage-RH), correlated color temperature (CCT) (K), color rendering index (CRI), and easy setup.

This also means that designers have to maintain design aims at heart, which ought to be centered on several features, including light output (lumens), power, luminaire effectiveness, life, CCT, CRI, and power factor, all with minimal and maximum targets.
The Designlights Consortium¹ has come up with a set of technical requirements as helpful tips for high-bay luminaires for industrial and commercial buildings, and high-bay aisle luminaires.

Here will be the technical specs for high-bay industrial and commercial buildings:

  • Minimal light output: 10,000 lumens
  • Minimal luminaire effectiveness: 80 lm/W
  • L70 lumen care: hours 35,000
  • Here will be the technical requirements for high-bay aisle luminaires:
  • Minimal light output: 10,000 lumens
  • Minimal luminaire effectiveness: 80 lm/W
  • L70 lumen care: hours 35,000
  • Guarantee: 5 years

Now let us have a look at some LED examples that satisfy these conditions beginning with two second-generation XLamp platforms: the XM-L2 XP-E2 and LEDs. Intended for very-high-lumen uses, including indoor, high-bay, and outdoor lighting, the second-generation XLamp XM-L2 single-die LEDs provide 20 percent more lumens per watt, in addition, to double the lumens-per-dollar set alongside the first XM-L LEDs, which means illumination designers can use fewer LEDs in a lowered price. The LEDs offer up at 25°C, at 350 mA.

Essential options that come with the xml2 contain:

  • Accessible white, 80-CRI white, 85- 90, and CRI white -CRI white
  • ANSI- bins that are compatible chromaticity
  • Maximum drive current: mA 3,000
  • Infinite flooring life at ≤ 30ºC/85 percent RH
  • JEDEC J-STD-020C
  • Electrically neutral thermal course
  • UL-recognized element (E349212)

The xml2 LEDs to be compatible with present XML LED designs, leveraging the 5 x 5 millimeters XM footprint. “This enables existing customers to readily integrate the second-generation components into XM LED layouts to shorten the fixture layout cycle and enhance time to market.

Obtainable in 2,700K to 7,000K color temperatures with minimal CRI choices , 85, and 90. of 70, 80
Qualified at 85°C, the xml2 LED is available in 2,700K and offers minimal CRI choices of 80, 85 to 6,200K color, and 90. But as the xml2 LED is a successor product to the XM-L LEDs, the effective use of Energy Star qualification needs just 3,000 hours of LM80 data, instead of the standard 6,000 hours, according to Cree.

Essential options that come with the XP E2 LEDs comprise:

  • Accessible 80, white, outside white -CRI, 85-CRI, 90-CRI
  • White, royal blue, blue, green, amber, reddish-orange, and crimson
  • ANSI- bins that are compatible chromaticity
  • Infinite flooring life at ≤ 30°C/85 percent RH
  • Reflow solderable –
  • Electrically neutral thermal course
  • RoHS-compliant
  • UL-recognized element (E349212)

As with the xml2 platform, the XP E2 can boost the lumen output signal of the first XPE layouts in power and exactly the same price or lower the system cost through the use of fewer LEDs. This also speeds up time to market thanks into a redesign that is minimal required to update functionality.

Philips Lumileds also offers several LED products that may be utilized in high- low and bay -bay luminaire designs. Program conditions include raised optical control to optimize luminaire spacing, uniform light, precise color interpretation for security and readability, instanton without dimming, and a decrease of dependability and occupancy-based management characteristics, based on Philips.

Like the XP L2, the XP E2 LEDs, as a “successor” merchandise to the first XPE LED, just needs 3,000 hours of LM80 information instead of the standard 6,000 hours, One good example that satisfies these conditions for high-bay luminaires, together with many different other uses, is the LUXEON R LED family from Philips Lumileds. All LUXEON R LEDs are hot examined and set at real world operating states of 700 mA, TJ = 85°C, and characteristic “Independence from Binning,” which means that every LUXEON R LED falls in just an individual five-step MacAdam ellipse (color space centered about the ANSI CCT color bins). This guarantees that light makers are certain to get color uniformity from HID to LED.

The LUXEON R additionally is footprint compatible with LUXEON Rebel ES and LUXEON Rebel, while providing better quality, higher effectiveness and more light output . These LEDs give you the very least CRI of 70.
Crucial specifications of the LUXEON R contain:
Hot pinned down and analyzed at TJ=85°C
Independence from binning: 5SDCM
CRI minimum: 70
Minimal flux: 160 to 200 lumens

Another Philips platform family that will fulfill with high- and low-bay lighting, together with many different other uses is the LUXEON TX platform, which can be obtainable in an assortment of CRIs and CCTs. With this particular line, a minimal 85 CRI choice was added by Philips for greater design flexibility and product differentiation.

Formerly, Philips said designers needed to choose either lower effectiveness related to more inferior color interpretation related to an 80 CRI LED or a 90 CRI LED. By providing high CRI with increased effectiveness in a CCT range from 2,700K to 5,000K., the LUXEON TX is believed to bridge the difference involving the two

  • Below are a few of the essential options that come with the LUXEON TX:
  • Streamlined 3737 bundle
  • Resistance of thermal typical VF of 2.8 V and 3K/W
  • Hot examined at TJ = 85°C
  • Independence from binning: – 3 and 5 SDCM
  • Exceeds Energy Star lumen care necessities
  • UL-recognized element [E352519] with degree 4 enclosure

Thought To sum up, engineers should take numerous variables into account when designing their high-bay luminaires, including thermal management problems, like appropriate heatsinking, picking the best driver among the multiple driver possibilities, and picking the right LED that satisfies the required technical specifications, encompassing power, life, light output (lumens), CCTs, and CRI. Price necessities of the layout also LED that satisfies the required technical specifications, encompassing power, life, light output (lumens), CCTs, and CRI. Price necessities of the layout also has to be seen as a variable. Designers that take these features into account early in the design will develop highly-efficient lighting systems in the appropriate price point.

References Used: The Designlights Consortium

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