LED optics

New LED Optics Will Optimize LED High Bay Aisle Lights and Change Performance Metrics


LED Optics are the components that have the ability to change the beam angle and overall directionality of light output. Independence LED is pleased to include a new generation of optics on its fixtures to optimize the performance for aisle lights in warehouses, distribution centers, grocery stores, and retailers from small to big box facilities.

Lumens are not all created equal. The total amount of light as measured in lumens and the efficiency of light fixtures as measured in lumens per watt are both key data points in the selection process of LED high bay fixtures. The latest innovations in LED Optics can direct light to where it is needed most and in so doing increase the efficiency of the LED fixtures.

The celebrated 20th Century modern architect Ludwig Mies van der Rohe famously said, “Less is More.” In the case of LED light fixture output, more light has typically been more favorable. However, less total light is now more beneficial from an energy consumption standpoint if the LED light fixture uses optical technology to delivers the desired foot candles at the horizontal and vertical surfaces of any given facility.

As an example, an LED high bay fixture listing 18,000 lumens may appear in the specification data sheets to provide less light than a fixture listing 24,000 lumens. Since lumen is the measurement of total light output and foot candle is the measurement of light at a certain distance from the light source, buyers need to evaluate both data points. The challenge in level setting specification sheets is that the foot candle measurements are variable relative to multiple factors such as vertical distance between the floor and the fixture hanging height, horizontal distance between fixtures, reflectivity of surrounding surfaces, the width of aisles for storage and retail properties, and other factors. Buyers need to ask the lighting manufacturers and/or the suppliers to review the IES (Illuminating Engineering Society) files for each fixture and run photometric analysis for side by side comparison. Since LED lights last over 100,000 hours in many cases, taking the time to get it right from the beginning just makes good business sense.

To help commercial and industrial buyers identify a “short list” of the most appropriate LED light fixtures for their property, organizations such as the DesignLights Consortium may want to consider adopting a new foot candle “scenario” template strategy. In the case of categories like LED High Bay or LED Aisle Lights, the template could include some simple uniform scenarios such as:

Facility Data:

Fixture Vertical Placement: 36’ ceiling with 34’ from floor to fixture

Fixture Horizontal Placement: 24’ between fixtures

Fixture foot candle performance measured at work surface 2.5’ from floor

Fixture Data:

Aisle Width 12’:

Foot-candles at work surface for this LED fixture: __ fc

Foot-candles at heights on the shelving for this LED fixture: 6’: __ fc, 12’: __ fc, 18’: __ fc, 24’: __ fc

Aisle Width 8’:

Foot-candles at work surface for this LED fixture: __ fc

Foot-candles at heights on the shelving for this LED fixture: 6’: __ fc, 12’: __ fc, 18’: __ fc, 24’: __ fc

Aisle Width 6’:

Foot-candles at work surface for this LED fixture: __ fc

Foot-candles at heights on the shelving for this LED fixture: 6’: __ fc, 12’: __ fc, 18’: __ fc, 24’: __ fc

While business owners and managers have different ceiling heights, horizontal spacing in their ceilings, and aisle widths, a template scenario system would at least provide some level set comparison of fixtures to make a short list. The buyers and or their representatives can always choose to make the deeper dive and model the photometrics with the IES files to match their specific building. This idea of an LED scenario template is not unlike what the automotive manufacturers provide relative to miles per gallon (MPH). For cars there are two basic “scenarios” for MPG: City driving involves more stops and starts than highway driving, and both also involve level-set assumptions about acceleration and speed. Everyone that buys a car will inevitably drive some combination of city and highway blend and have different driving habits that impact MPG. At least, auto buyers can compare multiple vehicles based on a uniform template.

As the adoption of energy-efficient LED lighting increases across the U.S. and the global market, the complexity increases as well. Buyers have the opportunity to save 50% or more energy over traditional lighting, and the latest generation of LED optics provides favorable paybacks over T8 and T5 fluorescent tube fixtures as well as the less efficient High Intensity Discharge (HID) fixtures such as Metal Halide.

See the most cost-effective 10 year warranty LED High Bay lights: Independence LED High Bay Series