Indoor LED Light
Energy index
Certificate
Green Partner
2012-09-28 Extend the life of LED lighting systems with thermal management
With light emitting diodes (LEDs) at the forefront of new residential and commercial fixtures, engineers and designers often struggle with ways to protect LEDs from premature failure due to thermal issues. LEDs permanently lose their brightness when thermally stressed and will degrade much quicker than the manufacturer intended. The additional cost of the emitters should be balanced with the thermal design to provide not only an elegant lighting solution, but the long life promised by solid state lighting.
Today, roughly 20% to 50% of the electrical energy produced worldwide is used for lighting. With the world population growing there are only two alternatives, generate more electricity by building new power plants or work more efficiently with what is already being produced. Even if new power stations are built, the power lines connecting them to where the energy is needed can take many years to plan and install. Improving efficiency is one solution to mitigate the rising trend of power consumption and has the focus of the lighting industry. LEDs came on the scene commercially around the 1970's as a replacement for incandescent bulbs used as indicators.
Today, LEDs have efficacies over 100 lumens per watt and are finding their way into a large selection of general lighting applications. One of the earliest issues converting fixture designs from incandescent bulbs to LEDs is the difference in thermal characteristics. LED manufacturers actually publish life curves for their emitters as a function of temperature... something fixture designers may have never seen before.
The problems with LEDs
Incandescent bulbs could be referred to as heaters that emit some visible light. Around 90% of the light emitted from an incandescent bulb falls into the infrared region beyond 700 nanometers – invisible to humans but not imperceptible
Today, roughly 20% to 50% of the electrical energy produced worldwide is used for lighting. With the world population growing there are only two alternatives, generate more electricity by building new power plants or work more efficiently with what is already being produced. Even if new power stations are built, the power lines connecting them to where the energy is needed can take many years to plan and install. Improving efficiency is one solution to mitigate the rising trend of power consumption and has the focus of the lighting industry. LEDs came on the scene commercially around the 1970's as a replacement for incandescent bulbs used as indicators.
Today, LEDs have efficacies over 100 lumens per watt and are finding their way into a large selection of general lighting applications. One of the earliest issues converting fixture designs from incandescent bulbs to LEDs is the difference in thermal characteristics. LED manufacturers actually publish life curves for their emitters as a function of temperature... something fixture designers may have never seen before.
The problems with LEDs
Incandescent bulbs could be referred to as heaters that emit some visible light. Around 90% of the light emitted from an incandescent bulb falls into the infrared region beyond 700 nanometers – invisible to humans but not imperceptible
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