Greenlux News


LED Considerations


1. The Color Temperature / Color Appearance – KELVIN·         This is a measure of how cool (bluish) or warm (reddish) the light appears this is measured in KELVIN (K). Warm White 2700K to 3500K
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What does CCT- “Correlated Color Temperature” in lighting mean?


The correlated color temperature CCT relates to the color appearance/temperature of an artificial light source. CCT is defined in degrees by KELVINWarm white light will be between 2300K- 3500KNeutral or natural white light will be around 4000KAnd cool whi
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What is CRI – COLOR RENDERING INDEX in Lighting


Color rendering Index CRI is the light sources ability to accurately render all frequencies of the color spectrum, or to reveal the colors of various objects accurately when compared to a natural light source as in a clear blue daylight sky at 12 midday.
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What is Light intensity?


LIGHT INTENSITY is the measure of the light output in a specified directionThe unit of LUMINOUS INTENSITY is “CANDELA (CD)”Illuminating powerConcentration of light in a specified directionLuminous intensity is denoted by the letter “I”
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What is Illumination


Illumination is the intensity of light falling on a given place on a lighted surface; the luminous flux incident per unit area expressed in lumens per unit of area … a source of illumination
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What is CLEAN ENERGY


OUR ENVIRONMENT votes for CLEAN ENERGY Our planet is facing a very real threat of climate change, caused primarily by human activity. Every year we release more and more greenhouse gases into the atmosphere, despite our goal to reduce
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What is Luminous Efficacy?


LUMINOUS EFFICACY is the ratio between the Luminous Flux of a lamp and the power the lamp consumes This is expressed as Lumens per Watt - lm/WThe Higher the Lumens per watt the higher the efficiency.
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Lighting Terms


Luminous efficacy- unit: lm/WLuminous efficacy is a property of light sources, which indicates what portion of the emitted electromagnetic radiation is usable for human vision. It is the ratio of emitted luminous flux to radiant flux. Luminous efficacy
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What is Lumen Maintenance?


The term “Lumen Maintenance” is the luminous flux lost over a period of time in LEDs. It described the remaining luminous flux over time, with respect to the original luminous flux of the LED luminaire when it is brand newBecause the LED continuously
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What is LED Lighting?


LED – (light emitting diode) is an electronic device – a semi-conductor device that converts electricity into light When power is applied, electrons flow across the PN junctionThe PN junction diode emits light when activated. The energy is released i
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What does Luminous Flux mean?


LUMINOUS FLUX is the amount of light radiated by a light source per second in all directions. The UNIT of LUMINOUS FLUX is “LUMEN”The luminous flux does not specify the direction in which the light is being emitted
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