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FAQ

 

 

What is LED?

Light-emitting diodes (LEDs) are solid-state lighting components. Each LED consists of a semiconductor diode that emits light when a voltage is applied to it. They have no moving, fragile parts and can last for decades. LEDs can be many times more energy-efficient than light bulbs, depending on the application. LED lighting can save up to 85 percent of the electricity used by incandescent bulbs and up to 50 percent of electricity used by fluorescents.

The electronics industry has used LED technology for several decades as indicator lights for various electronic devices. In more recent years, LED technology has progressed to the point where it is viable for general lighting applications.

Most of the energy emitted from incandescent bulbs is converted to heat instead of light. That’s why you’ll burn yourself if you try to touch an incandescent bulb once it’s turned on. Since LEDs consume significantly less energy, they don’t emit as much heat. That’s why you typically won’t burn yourself if you try to touch an LED light once it’s turned on. LED lights are also designed to last about 50 times longer, which means less ladder-climbing maintenance and less waste.

 


 

Does turning LED lighting on and off reduce lifetime?

No. Unlike incandescent and fluorescent lighting which will fail sooner when switched on and off more often, LED lighting is unaffected by how often it is switched on and off.

 


 

How does ambient temperature affect LED efficiency?

LED fixtures must be designed with junction temperature thermal management as a key component and use the correct LEDs. These products will then be robust enough to operate in most ambient temperature applications. Unlike fluorescent sources, cold temperatures do not impact the performance of LEDs.

 


 

What is 50.000 hours?

It is 50 times the life of a typical incandescent bulb and 5 times the lifetime of an average compact fluorescent lamp (CFL).  In fact, if you ran one lamp for 6 hours per day every day, it would last for nearly 23 years. That is five presidential elections, time for a home remodelling, and the expanse of an entire generation.

Useful life has been defined as the number of hours an LED device can operate until it emits only a certain percentage of its original lumen output. For general illumination applications, vision research suggests that 70 percent of original lumen output is the level where end users begin to notice a drop in light levels. This metric is indicated as L70. The Illuminating Engineering Society of North America (IESNA) published LM-80-08, IES Approved Method for Measuring Lumen Maintenance of LED Light Sources.

 


 

What is CRI, and why is it important?

Color Rendering Index (CRI) is defined as a light sources ability to render color.  The higher the CRI, the better the light source renders every color in the visible spectrum.  To have what is generally considered good color rendering, a source must be >80 CRI.

 


 

What is Power Factor?

In the most simplest terms, power factor is the measure of how effectively your equipment converts electric current (supplied by your power utility) into useful power output, such as light, heat or mechanical motion. In technical terms, it is the ratio of active or usable power measured in kilowatts (KW) to the total power (active and reactive) measured in kilovolt amperes (KVA). 

Why does Power Factor matter?

Power Factor matters because it can cost your company money & increase your company’s carbon footprint. When your company’s power system has a low power factor, your power system is demanding significantly more power than it is actually using. This results in additional charges on your company’s electricity bill and increases the amount of energy demanded on the power grid, increasing your company’s carbon footprint.

 


 

What is a Beam Angle?

Beam angle is the angle of which a light is emitted. More specifically, it is the Full Width at Half Maximum. Since there is no real way to measure the 'edge' of light we measure the beam angle from where the light is at 50% intensity (FWHM). By being able to measure where 50% light intensity ends, it gives us the majority of where the light is used thus representing the beam angle. Smaller beam angles will have an intense hot spot, where as larger beam angles will have a lesser intensity (due to a larger area). Take a look at our beam shots and see if you can gauge where 50% intensity ends, giving you the beam angle.

 


 

What is Lumens?

Lumen is a unit of light measurement otherwise known as luminous flux. We use lumens to compare the total amount of light output from a light emitter. However, lumens isn't the end-all, be-all. In fact, lumens will only tell you a one part of the picture because when it comes to producing a great beam pattern, it doesn't give you enough information to tell you how the light output is used. A comparable analogy of lumens is an automobile's total brake horsepower (BHP). 

 


 

What is Lux?

Lux is a unit of light measurement taking area into account. In other words, light intensity. We use lux to measure the amount of light output in a given area, where one lux is equal to one lumen per square meter. Lux is a great measurement for determining what we see as the brightness of a beam. If the light output is concentrated over a smaller area, we see this as very bright. If the light output is spread over a larger area, we see this as very weak. We normally use mirrors, reflectors, and optics to control the path of light and create the desired beam pattern. Lux also determines the magnitude of light intensity travelling over distances. A light that is configured for high lux output will travel farther but will have a smaller footprint of light, and a low lux level will be configured to travel shorter distances but have a larger footprint.

 

Illuminance

Surfaces illuminated by

0.0001 lux

Moonless, overcast night sky

0.002 lux

Moonless clear night sky

0.27 – 1.0 lux

Full moon on a clear night

100 lux

Very dark overcast day

400 lux

Sunrise or sunset on a clear day

1000lux

Normal overcast day

10.000 – 25.000 lux

Full daylight (not direct to sun)

32.000 – 100.000 lux

Direct sunlight