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inLEDs Lighting Pte Ltd

16 New Industrial Rd, #05-09
Hudson Technocentre,
Singapore 536204
(65) 6748 2644

(65) 6747 5664

sales@inleds.com

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FAQ

To help you gain a quicker and more thorough understanding of LED lightings, we have compiled some of the most frequently asked questions and provided the answers for you here. Feel free to contact INLEDS Lighting and we will be glad to answer your questions and help you learn the best methods and most efficient ways to creatively light up your home or business.

How Efficient are LEDs Compared to Traditional Light Sources?

According to Energy Star in U.S., LED light source use 75-80 percent less electricity than incandescent bulbs and fluorescent bulbs, to produce the same lumen output of light; and can have a lifespan up to 10 times longer than traditional light sources.

Average LED lightings in the current market produce in the range of 90~150 lumens per watt, depending on the type of LED.

How Durable are LED Solutions?

LED lighting normally doesn’t burn out like other traditional light sources. They get increasingly dimmer over time. This process is usually called lumen depreciation. The lifecycle of LED is basically based on the operating hours until it emits 70% of its initial light output.

A normal incandescent lamp can last about 600-800 hours, while a CFL may last for about 6,000-10,000 hours. The best quality fluorescent lamps can last for 30,000 hours.

Top-quality LED lighting with good designed fixtures usually has an efficient life of 50,000-60,000 hours. Some highly emerged designs may also exceed 100,000 hours.

What Colors are Available with LEDs?

LED strip lights and other decorative LED options are available in most colors: red, orange, yellow, green, blue, violet, pink, and purple are the options. Most regular LED lightings are classified as several different types of white with Color Temperature, which is measured in degrees of Kelvin (K).

At INLEDS Lighting, the main color temperatures are “Warm White” (2700K-3000K), “Cool White”/ ”Natural White” (4000K-4500K), and “Day Light”/ ”Pure White” (6000K-6500K).

Why do Some LED Lights Change Color Over Time?

Phosphor layers are chemical coatings on LED chips that gives its colors. Color changes are very often caused by degradation of the phosphor layers. It is important to buy LED lights mounted with quality LED chips.

Other causes of color change would most likely be the diffuser which is usually made of plastics that have changed color due to degradation or aging and/or exposed to heat for over a long period of time.

At INLEDS Lighting we supply products mounted with high quality LED chips, some of them are: Lumileds 3030 & 5050, Cree, Epistar, Philips etc.

Do LEDs Get Hot & Give off UV?

LEDs do give off some heat, but much less than energy-saving sticks, twisters and traditional light bulbs. Just as importantly, when used in your light fittings at home, LEDs don’t emit infrared (IR), only visible light. You can’t see IR so it doesn’t add to the brightness of the light; it just makes bulbs hotter and wastes energy. Another plus point is that LEDs don’t emit ultraviolet (UV) light either.

Why do LED Lightings need LED Drivers/Power Supplies?

LEDs have a characteristic of current-voltage; the current is dependent exponentially on the voltage. This means that a small change in voltage can cause a large change in current. LED can be damaged or destroyed if the applied voltage exceeds the forward voltage drop by a small amount as the current rating may be exceed by a large amount. Constant-current LED drivers keep the current below the LED’s maximum current rating. Some LED fixtures like GU10 spotlight includes a current-limiting resistor.

At INLEDS Lighting we use quality power supplies from established brands that are certified with international standard, such as MEAN WELL, Moso, Eaglerise, Inventronics etc.

Why does LED Light Fail while It’s Supposed to Last for 5 to 10 years?

Most failures are caused by low quality power supply units that could not control the voltage and current well (see the question above), the power supply burned itself out (poor components), and/or used the wrong voltage and/or current power supply. A typical good LED power supply (driver) should withstand 2-3 years of continuous usage. Just like any traditional light source like incandescent bulbs and fluorescent tubes, it is wiser to leave the lights on for a longer period of time than turning it-on-and off multiple times. The cost of saving that little electricity will not cover the cost of your light breaking down.

Are LED Lightings Cost-Effective?

Although the initial cost of a LED bulb is higher than that of a traditional light bulb, in the long term you save money. The initial investment is more than paid back over the life of the bulb because the running costs are lower due to lower energy consumption and they won’t need replacing for a very long time, typically around 15 years. And don’t forget that the prices for LED lighting now are already lower than a few years ago, and are getting closer to the prices of traditional bulbs, the added value will increase.

Our LED lights have a lifespan of at least 20,000 hours, they also consume up to 80% less energy than traditional lamps, so you’ll soon enjoy savings in your energy bill. At INLEDS Lighting we are focused on products that are more effective than many ‘similar’ LED lamps with the same wattage and color temperature, so you get brighter illumination for the same energy consumption.

Are LED Lightings Environmental Friendly?

LED Lights do not accumulate harmful chemicals in the environment. The compact fluorescent lights which have 4 to 5 milligrams of mercury present in each of them, LEDs do not contain mercury, lead or other toxic materials which can be hazardous for environment or public health, and are completely recyclable just like most other electronic devices.

Greenhouse gas emissions associated with the LED lights are relatively far less than the conventional incandescent or Compact fluorescent lights. According to carful calculations, one LED bulbs, providing the same luminosity as one incandescent bulb emits 80% less greenhouse gases. The same calculation for CFLs suggest a reduction of 50% GHGs by switching to LED lights.

LED Lighting Technology Glossary

We have compiled some of the most commonly used terms in the LED lighting industry and their definitions to help you fully understand the language and what you are purchasing.

Color Temperature (CCT)

Color Temperature (CCT) is a description of the warmth or coolness of a light source, i.e. light in a range going from red to orange to yellow to white to blueish white. Color temperature is conventionally expressed in “Kelvin”, using the symbol K, on a scale from 1,000 to 10,000. Typically, Kelvin temperatures for commercial and residential lighting applications fall somewhere on a scale from 2000K to 6500K.

Color Rendering Index (CRI)

The effect of a light source on color appearance is expressed in the Color Rendering Index (CRI), on a scale of 0-100. Natural outdoor light has a CRI of 100 and is used as the standard of comparison for any other light source. The higher the CRI rating, the higher closer the light compared to natural light. CRI is normally taken in controlled laboratory to give a more accurate reading. CRI rated above 80 is excellent for home and commercial use which reflects color truly and naturally.

Luminous Flux

In photometry, luminous flux is the measure of the perceived power of light, to reflect the varying sensitivity of the human eye to different wavelengths of light.

The international (SI) unit of luminous flux is the lumen (lm). One lumen is defined as the luminous flux of light produced by a light source that emits one candela of luminous intensity over a solid angle of one square radian.

Lumen (lm)

The lumen (lm) is the international (SI) derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time. Lumens are related to lux in that one lux is one lumen per square meter. LED lightings are commonly labelled with their light output in lumens.

Lux (lx)

The lux (lx) is the SI derived unit of illuminance and luminous emittance, measuring luminous flux per unit area. It is equal to one lumen per square meter.

For example, 500 lux might be bright enough for a home kitchen with light fixtures with an output of 12000 lumens, but to light a factory floor with much larger area to the same level of lux requires a greater number of lumens.

Beam Angle

The Beam Angle of a lamp is the angle at which the light is distributed or emitted.

The lighting industry’s uniform formula to determine the beam angle: the light output (lumens) is measured at the center of the beam and then light strength (intensity) is measure out from the center until it is 50% of the intensity level. The beam angle is determined in degrees: the most common designations for light beams are Spot (7 to 15 degree), Flood (20 to 35 degrees), Wide Flood (35-50 degrees), and Very Wide Flood (50-120+ degrees).

Power (Output)

The power output of lighting is determined in Wattage, while LED lighting’s luminous efficacy is determined by lumen/watt (lm/w). Lumen and wattage are important concepts to understand when considering the energy use of a light source. Simply put: a LED light uses far less energy (watt) to produce the same light output (lumen) than traditional lighting.

Dimming

A light fixture can be connected to devices called dimmers/dimming drivers to lower the brightness of light to various luminous level. By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output. LED lighting dimming commonly works with dimming systems, such as 0-10V Lighting Control, DMX512, DALI etc.

IP Rating

IP is an acronym “Ingress Protection”. It is a measurement of the protection an item will have against solid objects (dust, sand, dirt, etc.) and liquids. An IP rating is comprised of 2 numbers. The first number (0-6) refers to the protection against solid objects (dust, debris etc.) and the second number (0-8) refers to protection against liquids and moisture.
General indoor LED lightings are IP20-IP40; while for outdoor lightings there are IP65 (Water resistant), IP66 (Water resistant against powerful water), IP67 (Water resistant plus temporary submersion).

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