Things You May Want to Know About Led Light Fixtures

An overview of led light fixtures

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How come it says a regular red LED uses 1.7 volts and a regular nightlight bulb uses 4 watts? of led light fixtures

wattage tells how much current a device draws.

voltage tells the voltage it is designed to run on.

an led's power consumption can be measured in watts.

a light bulb's power consumption can also be measured in watts.

led's are designed to run on very low voltage. (led light fixtures have a built-in transformer to step down the voltage)

light bulbs are designed to run on 120 volts. low wattage bulbs draw less current. high wattage bulbs draw more, but they all use the same voltage.

the reason that an led package tells you what voltage to use, is so that you won't put it in a circuit with too high voltage and burn it out.

the reason that a light bulb package tells you what wattage it is, is so that you'll know approximately how much light it puts out, since most people are already familiar with the intensity of a 40 watt bulb, compared to a 60 watt bulb. household light fixtures are all 120 volts, so the voltage is already assumed by the user.

LED Lighting Can Add Up To Big Savings of led light fixtures

The light-emitting diode (LED) is one of today's most energy-efficient and rapidly-developing lighting technologies. Quality LED bulbs last longer, are more durable, and offer comparable or better light quality than other types of lighting. Recent price reductions have now made LED lighting more affordable than ever.

LED lighting products use light emitting diodes to produce light very efficiently. An electrical current passes through semiconductor material, which illuminates the tiny light sources we call LEDs. The heat produced is absorbed into a heat sink.

LEDs are now being incorporated into bulbs and fixtures for general lighting applications. LEDs are small and provide unique design opportunities. Some bulb solutions may look like familiar light bulbs and some may not, but can better match the performance of traditional light bulbs. Some LED light fixtures may have LEDs built-in as a permanent light source.

Bulb Longevity

Theuseful life of LED lighting products is defined differently than that of other light sources, such as incandescent or CFL. This is because they 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), it's product "lifetime" is set based on a prediction of when the light output decreases 30 percent.

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 semiconductor material. 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 the bulbs from overheating and burning out.Thermal management is probably the single most important factor in the successful performance of the 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.

LED products use a variety of unique heat sink designs and configurations to manage heat, so they may look very different from each other. Regardless of the heat sink design, all LED products that have earned the ENERGY STAR have been tested to ensure that they properly manage the heat so that the light output is properly maintained through the end of its rated life.

Cost Savings

The table below compares a 60 watt traditional incandescent with energy efficient bulbs that provide similar light levels.

Comparisons between Traditional Incandescents, Halogen Incandescents, CFLs, and LEDs

60W Traditional Incandescent

43WEnergy-Saving Incandescent

15W CFL

12W LED

60W Traditional

43W Halogen

60W Traditional

43W Halogen

Energy $ Saved (%)

-

25%

75%

65%

75%-80%

72%

Annual Energy Cost*

$4.80

$3.50

$1.20

$1.00

Bulb Life

1000hours

1000 to 3000hours

10,000hours

25,000hours

*Based on 2 hrs/day of usage, an electricity rate of 11 cents per kilowatt-hour, shown in U.S. dollars. (source:energy.gov)

LED lighting is extremely energy efficient and consumes up to 80% less power than incandescent bulbs resulting in a dramatic decrease in power costs. Money and energy is also saved in maintenance and replacement costs due to the long bulb lifespan. All of these factors make LEDs smart economic sense.