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LED Lighting 101
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Glossary of Lighting Terms
Landscape Lighting for the Homeowner
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LED Lighting 101: What is an LED?
LED stands for Light Emitting Diode. An LED is an electronic semiconductor that efficiently emits light.
So what does this mean to you?
Compared to the standard bulb or halogen light, LED lights are:
•Smaller in size
•Consume less energy
•Are proven to be more durable and reliable
•Contain no harmful toxins
•Do not emit dangerous UV rays
Choosing the Right LED Color Temperature.
LED lighting offers many benefits and features that were difficult, if not impossible, to offer with other lighting technologies. Many of the obvious benefits, such as substantial operating energy and cost reductions, longer life and lower overall heat generation are generally well known. Another feature that allows for dramatic appearance and productivity benefits, now and in the future, involves the color temperature of the light produced by LEDs.
Tip Choosing the right color temperature can sometime be difficult. These helpful tips will get you started in the right direction.
•Light color is measured on a temperature scale referred to as Kelvin (K).
•Lower Kelvin numbers mean the light appears more yellow; higher Kelvin numbers mean the light is whiter or bluer.
•For a warm-yellow light, use bulbs marked 2700-2900K.
•For a whiter light, use bulbs marked 3000-4100K.
•For bluer white light, use bulbs marked 4200-6500K.
LED: Fact or Fiction
What’s the truth about LEDs?
Fiction: LED Lights Last Forever
FACT LED Lights have an extremely long lamp life in comparison to incandescent and fluorescent lights, but they are not immortal. LEDs will slowly fade over time, just like the rest of us. However, LEDs can wear out much faster if they are not installed or maintained properly. If an incompatible driver is used, or the LED is over heated, lumen depreciation can accelerate which could eventually cause the overall lamp life to decrease from 80,000+ hours of usage to a mere 10,000 hours.
•When the correct driver is installed and proper thermal control is maintained (which can be avoided by using a LED specific Dimming Driver or a heat sink), LED lamp life can easily achieve 80,000+ hours of usage, while still maintaining 70% of the original light output.
Fiction: LED Lights Aren’t Bright and Are Poor Quality
FACT LED Lights are bright enough to be seen outside during daylight hours, which are why many are now used in most traffic lights, tunnels, and even throughout entire buildings. Also, according to the Color Rendering Index (CRI: a metric that measures the quality of lights on a scale from 0-100), LED Lights have been achieved a score of 75+. The average LED Light typically scores from 75-85 and some high quality LED Lights can have a CRI of 90+.
•LED lights also have color temperatures ranging from 2,500 to 6,500. These temperatures describe apparent visual warmth or coolness. The warmest being Warm White (2,500K) to the coolest being Daylight (6,500K). This range allows LEDs to be incredibly versatile and useful in any setting.
Fiction: LED Lights Use Little Power
FACT LED Lights use only 15% of the energy a standard halogen light uses, and provide up to 85% more light output. While this makes LEDs highly energy efficient in comparison, power is still utilized.
Fiction: LED Lights Do Not Give Off Heat
FACT Fact: LED Lights give off 90% less heat then the standard halogen light. They do not give off any radiant heat, and in fact are cool to the touch in the direction where light is dispersing. However, they do need to blow off some steam every once in a while. That is, behind the LED Light conductive heat is released in order for lamp life to be maximized. With proper thermal design (such as through a heat sink) this conductive heat release is automatically monitored and managed.
•LEDs of the Future: LED Lights are continually becoming increasingly more efficient by enabling more light output per unit of energy.
Through further development, this will cause LEDs to emit even less heat over time and will eventually reduce the need for heat sinks.
Call Lightscapes Today for Your LED Landscape Lighting