All Field

Arena Downlight

Arena Pro

Arena Series

Lumadapt 8

Prism RGBA

Prism Series

Air Mesh Hub

Air Mesh Dynamic Scenes













What’s so special about LED lighting anyway?

LED is digital sports lighting that provides instant on-off capabilities, intelligent controls, and adjustability while delivering excellent light quality, consistent light output, maintenance-free operation and excellent energy efficiency. The difference between legacy metal halide lighting and LED is like going from an old rotary telephone to an iPhone, or a typewriter to a tablet – the increase in capabilities and performance is amazing.

Can I replace my current 1000W metal halide fixtures with the same number of LED fixtures?

No, but only because you’ll actually need fewer lights. For example, an Ephesus 600W indoor fixture can generate more light than competitors’ 1000W metal halides. This allows us to reduce fixture count while increasing light on the surface, making a “one to one replacement” unnecessary.

How do I know how many fixtures I need then?

Ephesus will generate a lighting design unique to your facility. We load a facility drawing into our specialized program, accounting for the sports played there and any special tournament or broadcast lighting requirements. We model the light in the venue and tell you how many fixtures are required to generate a certain amount of light and where they should be installed, as well as how uniform (or consistent) it will be throughout the venue. We use precise lenses to direct the light exactly where it’s needed, and a laser aiming system to ensure the lights are positioned where they need to be.

This sounds expensive…

One to one, our fixtures are comparable in price to competing LEDs. But our reduced fixture count, ease of installation, maintenance-free operation, energy efficiency, and controls options mean no other lighting costs less to buy, install, run, and maintain. Moreover, our new Lumadapt system is price competitive with competing options while providng you with an entire system around your lights for greater overall performance. An Ephesus installation may also qualify for energy efficiency rebates and incentives from your utility company to help defray costs.

How are your fixtures “maintenance-free?”

Ephesus LED fixtures have no moving parts to wear out, no traditional bulbs with filaments to burn out, and no ballasts to replace. Our fixtures have a 10-year warranty and have been tested to have a lifespan of over 225,000 cumulative hours with no noticeable decrease in light output.

My facility hosts a variety of events, from sports, to concerts, trade shows and ceremonies. Can your lighting accommodate this?

Absolutely, and this is an advantage Ephesus provides over traditional lighting! Through the use of controls, various dimming levels can be set for the different uses, and Ephesus fixtures can provide color-temperature tuning, which is the ability of the light to appear “warmer” or “cooler” at the push of a button. For the real “wow” factor, customized light shows and scenes can be developed to make the lights flash and dance to music or create unique effects. Ephesus even offers colored LED fixtures for another element of excitement.

What’s a lumen? What’s a foot candle?

A lumen is best described as a unit of light output from a light source. A foot candle is a measure of light on a surface. Typically, light from a single fixture is indicated in lumens, but this is not helpful because fixtures are installed as part of a system. The entire installation yields light in foot candles. This is why it’s important for Ephesus to create a custom lighting design – we can estimate the amount of light that will reach the surface in foot candles, which can be measured and verified after installation using a light meter.

I’m interested but what if I need help?

Ephesus is ready to assist you at every step, from outlining the initial project requirements to providing installation support. We coordinate with the installation team, whether that is employees at your facility, an electrical contractor or other parties, to make sure the job is done right. We pride ourselves on providing our customers with outstanding support and service. For more information or help, call us at 1-800-573-3600.




The unit for measuring rate of flow of electrical current: Current (Amps) = Power (Watts)/Voltage (Volts).


The extent to which an object is judged to emit more or less light. The brightness of an object can change depending on whether it is seen against a light or dark background.


A raised overhead platform used for mounting and accessing luminaires.


The quality of a color regardless of its luminance as determined by its hue and saturation.
Color Rendering or Color Rendering Index (CRI): The ability of a light source to reproduce surface colors accurately. A color rendering index is used to describe the performance of a lamp. Color rendering is rated on a scale from 1 to 100. The higher the CRI rating, the more accurately colors will be reproduced.

Controller Card

A device that controls the output of light. Contains software components for configuring fixtures and hardware components for sending control data to fixtures.

Coefficient of Variation (CV)

A measurement of illuminance uniformity. The standard deviation of a set of grid values divided by the average.

Daylight Harvesting

Refers to systems that use daylight to offset the amount of electric lighting needed to properly light a space, in order to reduce energy consumption.

Delivered Light

The amount of light a luminaire delivers to a surface. It is measured in foot-candles (fc) or lux. LEDs are directional and deliver a greater proportion of light to where it is wanted.


A signal protocol for controlling dimming and color mixing.


An electronic circuit that controls and regulates current flow through another circuit or other components in the circuit.


The efficiency of a light source. Measured in lumens/watt.

Electromagnetic Interference (EMI)

Electromagnetic radiation from an external source that affects an electrical circuit. The disturbance may interrupt, obstruct, or otherwise degrade or limit the effective performance of the circuit. These effects can range from a simple degradation of data to a total loss of data. The most common type of EMI occurs in the radio frequency (RF) range. This energy can be radiated by computer circuits, radio transmitters, fluorescent lamps, electric motors, overhead power lines, lightning, and many other sources. Device failures caused by interference — or “noise” — from electromagnetic energy are increasing due to the growing number of products that contain sensitive electronic components.


The (potentially visible) temporal variation of emitted light.

Foot-candle (fc)

A unit of light received on a plane; measured using a light meter.


An effect that occurs when lighting fixtures in the off state faintly glow as a result of residual voltage in the circuit.


Light that causes discomfort or reduces the ability to see because it comes from a source that is too bright compared with its background. Glare can be reduced by dimming the source, blocking the direct view or increasing the background level of luminance. Ephesus measures glare with a calibrated camera in a lumen sphere.

Heat Sink

A part of the thermal system that conducts or convects heat away from sensitive components such as LEDs.

Horizontal Illuminance

The quantity of light on a horizontal plane.


International Engineering Society of North America. The IESNA is the recognized technical authority on illumination, communicating information on all aspects of good lighting practice to its members, to the lighting community, and to consumers through a variety of programs, publications, and services.

Indirect Lighting

Lighting by distributing 90% to 100% of the emitted light upward.

Initial Light Levels

The average light levels when the luminaires are new. Measuring initial light levels assures that you receive a system that meets your requirements.

IP Ratings

“IP” stands for Ingress Protection. IP ratings have two numbers: the first stands for the protection against solid objects, the second for protection against liquids. For example, an IP rating of 65 tells you that the protection against solid objects is a 6 and the protection against a liquid is a 5.


Kelvin (°K) is a unit of measurement for temperature and is often used in the measure of the color temperature of light sources.

L70 Hours

Used to describe the LED’s expected light output over its stated life span. “L70” predicts when the LED reaches 70% of initial lumen output. Lumen maintenance is a prediction of the number of hours an LED will operate before it fades below a useful level of intensity. Currently, lumen maintenance reporting assumes that dropping below 70% of initial lumen output is the end of life for the emitter.


Light-emitting diode.

LED Array

An assembly of LEDs on a circuit board. Can include optical elements and additional thermal, mechanical and electrical interfaces that are intended to connect to the load side of an LED driver.

LED Chip

The light-producing semiconductor device that may or may not be incorporated into an LED.

LED Driver

An electronic circuit that inputs power into a current source — a source in which current remains constant despite fluctuations in voltage. An LED driver protects LEDs from normal voltage fluctuations, over voltages and voltage spikes.

LED Luminaire

A complete lighting unit consisting of LED-based elements and all necessary components: driver, parts to distribute the light, and parts to position and protect the light-emitting elements and connect the unit to a circuit branch.

Light Trespass

Spill light that is either annoying or unwanted.

Light Loss Factor (LLF)

A factor used in calculating luminance over a given period and under given conditions. It accounts for light loss due to temperature and voltage variations, dirt accumulation on luminaire, lamp depreciation, maintenance procedures and atmosphere conditions.


A unit of luminous flux; overall light output. Lumen output is a measure of the total “amount” of visible light emitted by a source. The higher the number, the more light is emitted.

Lumen Depreciation

A reduction in output over time. Normally shown in graph form with the percentage reduction in hours. Also see L70 hours.

Lumen Efficiency

The percentage of total lamp lumens that a luminaire or system emits, minus any blocked or wasted light.

Lumen Maintenance

The luminous flux at a given time in the life of an LED, expressed as a percentage of the initial luminous flux.

Lumen Maintenance Curve

A graph illustrating the predicted average light output behavior over time of a single LED or solution.


Quantifies the brightness of a light source or of an illuminated surface that reflects light. Luminance indicates how much luminous power will be detected by an eye looking at the surface from a particular angle of view, thus being an indicator of how bright the surface will appear.

Luminous Flux

The measure of the perceived power of light, adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light.


The SI unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square meter.

Maintained Foot-Candles

The average illuminance below which the light level is not supposed to fall throughout system life.

Max to Min Uniformity Ratio

A design criteria to assure that light is distributed evenly across the entire field. A max/min uniformity ratio of 2:1 means that the brightest point is no more than double any other point.


The light distribution of a floodlight is referred to as “beam spread” and is classified by its “NEMA type.” The NEMA beam spread indicates the two edges where the light intensity photometric spreads horizontal and vertical to 10% of the maximum beam intensity.

Obtrusive Light or Spill Light

Uncontrolled light that is directed up into the sky or beyond the boundary of a sports facility.


The science of the measurement of light, in terms of its perceived brightness to the human eye. Photometric studies (also sometimes referred to as “layouts” or “point by points”) are often used to simulate lighting designs for projects before they are built or renovated. This enables architects, lighting designers, and engineers to determine whether a proposed lighting setup will deliver the amount of light intended or required.

Power Factor (PF)

The measurement of the relationship between the AC source voltage and current. Power factors can range from 0 to 1.0, with 1.0 being ideal. Power factor is a measure of how efficiently electrical power is being used. The higher the power factor, the more efficient.

Power Factor Correction

A system of inductors, capacitors or voltage converters that adjust the power factor of electronic devices toward the ideal power factor of 1.0.

Pulse-Width Modulation (PWM)

A method used by LED drivers to regulate the amount of energy to the LEDs. PWM turns LEDs on and off at a high frequency, reducing total on time to achieve a desired dimming level.

RGB Color Model

An additive color model in which red, green, and blue light are added together in different proportions to produce a broad range of colors, including white.

Solid-State Lighting

A type of lighting that uses semiconductor light-emitting diodes (LEDs), organic light-emitting diodes (OLED), or polymer light-emitting diodes (PLED) as sources of illumination rather than electrical filaments, plasma (used in arc lamps such as fluorescent lamps), or gas.

Thermal Management

Controlling the operating temperature of the product through design. Examples include heat sinks and improved air flow.

Thermal Resistance

A material’s ability to conduct heat.

Tilt Factor

This factor is a function of the lamp position for each fixture and directly affects the lamp performance in that specific floodlight. It is part of the non-recoverable light loss factor.

Tunable Color Temperature

LED fixtures that combine channels of RGB color and cool white LEDs to produce a range of color temperatures.

Uniformity Gradient (UG)

Rate of change of illuminance between adjacent (grid) values.

Uniformity Ratio

Either the ratio of the illuminance in the brightest-lit spots to that in the dimmest areas (max/min), or of the average illuminance of the whole area to that of the dimmest spots (avg/min). The best results as far as visual acuity result when the uniformity ratio is close to one. A lower uniformity ratio means more evenly distributed light throughout your venue. An adequate level of uniformity is required to create balanced lighting conditions so that people’s eyes and the television cameras do not continually have to adapt to different light levels. As a television camera pans over a match or tournament, the differences in illuminance levels will affect the image quality.

Useful Life

The length of time it takes a light source to reach a certain percentage of its initial lumen output. Commonly defined as lumen maintenance thresholds. (See L70 hours.)

Vertical Aiming Angles

The degrees below horizontal that light fixtures are aimed at the field. Angles are measured from a horizontal plane at fixture height. Critical in safe, playable lighting design.

Vertical Illuminance

This is the quantity of light on a vertical plane.


The electrical potential difference between oppositely charged conductors.


The unit of power. Volts x Amps = Watts