The Basics of LED Lighting

The useful life of LED lighting products is defined differently than that of other light sources, such as incandescent or CFL. This is because LEDs typically do not “burn out” or fail. Instead, they experience lumen depreciation, where the amount of light produced decreases and light color appearance can shift over time. Instead of basing the useful life of an LED product on the time it takes for 50% of a large group of lamps to burn out (as is the case with traditional sources), LED product “lifetime” is set based on a prediction of when the light output decreases 30 percent.
an image of LED lighting after 100 hours

an image of LED lighting after 100 hours

LEDs and Heat

Because LED lighting systems don’t radiate heat the way an incandescent or halogen light bulb does, the heat produced from the power going into the product must be drawn away from the LEDs. This is usually done with a heat sink, which is a passive device that absorbs the heat produced and dissipates it into the surrounding environment. This keeps LEDs from overheating and burning out. Thermal management is probably the single most important factor in the successful performance of an LED product over its lifetime because the higher the temperature at which the LEDs are operated, the more quickly the light will degrade, and the shorter the useful life will be.

After less than a year of use, a poorly designed LED product can flicker, shift in color, look dim, offer uneven light, or continue to use power when turned off, among other problems.

LED products use a variety of unique heat sink designs and configurations to manage heat, so they may look very different from each other.

SinoGuide brand silicone materials can absorb stresses caused by thermal cycling inside the LED package, protecting the chip and the bonding wires

sinoguide tims in LED

                                                                              TIM application in LED

Medium to high power LEDs are constantly evolving, although the need to remove heat from that LED remains constant. SinoGuide’s focus is to lower junction temperature of the led by using a direct thermal path. lower junction temperature increases LED life, LED brightness, lumen output, product reliability and can even reduce dollars per lumen.

led thermal management

Leave a Reply

Your email address will not be published. Required fields are marked *