B2B Electronics

What Are LED Bulbs And How Do They Work?

LED stands for light emitting diode. LED lighting products produce light approximately 90% more efficiently than incandescent light bulbs. How do they work? An electrical current passes through a microchip, which illuminates the tiny light sources we call LEDs and the result is visible light. To prevent performance issues, the heat LEDs produce is absorbed into a heat sink.

Lifetime of LED Bulbs

The useful life of LED lighting products is defined differently than that of other light sources, such as incandescent or compact fluorescent lighting (CFL). LEDs typically do not “burn out” or fail. Instead, they experience ‘lumen depreciation’, wherein the brightness of the LED dims slowly over time. Unlike incandescent bulbs, LED “lifetime” is established on a prediction of when the light output decreases by 30 percent.

How is LEDs Used in Lighting?

LEDs are incorporated into bulbs and fixtures for general lighting applications. Small in size, LEDs provide unique design opportunities. Some LED bulb solutions may physically resemble familiar light bulbs and better match the appearance of traditional light bulbs. Some LED light fixtures may have LEDs built in as a permanent light source. There are also hybrid approaches where a non-traditional “bulb” or replaceable light source format is used and specially designed for a unique fixture. LEDs offer a tremendous opportunity for innovation in lighting form factors and fit a wider breadth of applications than traditional lighting technologies.

LEDs and Heat

LEDs use heat sinks to absorb the heat produced by the LED and dissipate it into the surrounding environment. This keeps LEDs from overheating and burning out. Thermal management is generally the single most important factor in the successful performance of an LED over its lifetime. 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. Today, advancements in materials have allowed manufacturers to design LED bulbs that match the shapes and sizes of traditional incandescent bulbs. 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.

How is LED lighting different than other light sources, such as incandescent and Compact Fluorescent (CFL)?

LED lighting differs from incandescent and fluorescent in several ways. When designed well, LED lighting is more efficient, versatile, and lasts longer.

LEDs are “directional” light sources, which mean they emit light in a specific direction, unlike incandescent and CFL, which emit light and heat in all directions. That means LEDs are able to use light and energy more efficiently in a multitude of applications. However, it also means that sophisticated engineering is needed to produce an LED light bulb that shines light in every direction.

Common LED colors include amber, red, green, and blue. To produce white light, different color LEDs are combined or covered with a phosphor material that converts the color of the light to a familiar “white” light used in homes. Phosphor is a yellowish material that covers some LEDs. Colored LEDs are widely used as signal lights and indicator lights, like the power button on a computer.

In a CFL, an electric current flows between electrodes at each end of a tube containing gases. This reaction produces ultraviolet (UV) light and heat. The UV light is transformed into visible light when it strikes a phosphor coating on the inside of the bulb. Learn more about CFLs.

Incandescent bulbs produce light using electricity to heat a metal filament until it becomes “white” hot or is said to incandesce. As a result, incandescent bulbs release 90% of their energy as heat.

If you have any interest in LED lamp manufacturer, try to check out the website of Daina Electronics Co., Ltd... They provide a variety of LED lights like multi-color LED, oval LED, rectangular LED, round LED, SMD LEDs, super bright LED lights, super flux LED, tape LED etc. More details, click here: www.daina-led.com to obtain the information you need.

Article Source: https://www.energystar.gov/products/lighting_fans/light_bulbs/learn_about_led_bulbs

In electronics, polarity determines how a component should be inserted into a circuit. A non-polarized component can be connected in any direction and will still function properly. A polarized component can only be inserted in one direction. Unlike incandescent light bulbs, which illuminate regardless of the electrical polarity, LEDs will only light with correct electrical polarity. When it comes to through-hole LED’s a polarized component usually has two pins.

If a polarized component is inserted incorrectly it may not work at all, or it may smoke, spark or fail. It’s a little bit harder to determine the polarity with Surface Mount LEDs (SMT LEDs). Surface mounted device LEDs (SMD LEDs) are electronics components without the connecting wires used with through-hole devices. Although initially intended for automatic manufacturing their use has expanded into hobby electronics. Smaller components lead to more compact circuitry and smaller devices. In fact, some components are available in SMD versions only.

Continuity Tests using a Multimeter

Often the easiest way to determine polarity of an SMT LED is by using a simple multimeter. This is achieved by carrying out a simple test: we set the selector to ‘Diode’ or ‘Continuity Test’ mode and place a probe on each end of the LED. Usually, the multimeter will supply enough current into the LED which will just barely light it up. However, there’s no guarantee your meter won’t over-do the current, so we recommend doing just a quick touch, or putting a resistor in line. The black (common) lead on the multimeter indicates the negative (cathode) lead, and the red indicates the positive or anode side. It will only emit light when the negative probe is on the cathode end and the positive probe is on the anode end. When the voltage across the p-n junction of the LED is in the correct direction, a significant current flows and the device is said to be forward-biased. If the voltage is of the wrong polarity, the device is said to be reversed biased, very little current flows, and no light is emitted. Of course, the best method to determine the polarity of your LED, the pinout, along with all the other specs is to locate the manufacturer’s datasheet.

Visual Inspection

The majority of LEDs have the cathode end marked, however it has been noticed that even within the same range of LEDs from the same manufacturer, there are differences. Red LEDs seem to be the exception, having a mark on the anode end, not the cathode one. Most often if you cannot see any of these markings, a small notch or dot will indicate the negative side of an LED. SMT LEDs typically have a dot or small green line indicating their cathode. Lighthouse LEDs provide a selection of SMD images in their Polarity Guide for 0402, 0603, 0805, 1206 and most all SMD LEDs.

DAINA is the professional manufacturer of SMD LEDs, if you have any question about LED series, welcome to send inquiries to DAINA Electronics. Also, welcome to visit our website to learn more information about super bright LED lights, tape LED, cylindrical LED and more products.

Article Source: http://www.limetrace.co.uk/how-to-determine-the-polarity-of-an-smd-led

Thinking about adding security strobe lights and/or sirens to your home security system? Think about why the alarm system was installed in the first place – to keep you and family or employees safe! Strobes and sirens can be wired to sound for different alarm occurrences such as fire or burglary.

If a burglar sees you have an alarm system they may very well bypass your property. Criminals rarely want the hassle of dealing with the alarm system since it increases that they may be detected and caught. Short of the criminal bypassing your home – you want to limit the amount of time the intruder is in your home. Here’s where strobe lights and siren can be extremely effective! Imagine if you violated someone’s property and sirens and bright strobe lights start going off – what would you do? Most people would get out of there!

There are a few main purposes behind the idea of adding security strobe lights and sirens to your home or business alarm:

• Let the criminal know he has been detected.
• Let neighboring homes/businesses know someone may have broken into your property or that an emergency is occurring.
• Bright flashing lights direct the police/emergency personnel to your home easily even on the darkest of nights.

Some people question whether a silent alarm may be the better way to go – assuming the intruder may get caught. Even with an alarm system, the chances of catching the criminal are slim to none. Most of the time – these intruders are not in your home long enough to be caught – they want to grab and be gone in minutes.

A silent alarm that does not alert the intruder that his presence has been noted may also put you, your family or employees in a dangerous situation. A loud siren and/or light are much more likely to deter criminals in the act.

When adding sirens or strobe lights to your home security system, keep these tips in mind:

• It’s a good idea to install two sirens (one indoors, one outdoors) as part of your home security system.
• When installing your outside siren, preferably mount the siren towards the front where it can be better heard.
• When installing strobe lights, make sure they are visible from all sides of the house – maximizing their effectiveness in fending off intruders.
• Make sure to test your home security system every few months to ensure sirens and strobe lights are in working order.

Ching Mars is an experienced safety light manufacturer, specializing in producing all kinds of Warning Lights including strobe lights, revolving lights, light bars, security strobe lights and so on. In order to get further information about our security strobe lights, welcome to browse the website of Ching Mars – providing you the highest quality warning lights to protect your personal belongings.

Article Source: http://EzineArticles.com/6639282

Amber strobe light is one of the main products of Ching Mars. Our amber strobe lights can be used in many applications, such as traffic, high risk zone, construction and any emergency. Ching Mars divides this series into three categories: UL approved strobe light, multi voltage strobe light and multi voltage LED strobe light. In order to affix to every application, some of amber strobe lights attach magnets. We do our best to provide the ideal form of warning lights. The strobe light of Ching Mars is available in different colors: amber, red, blue, clear… We will keep working to supply the best innovations and services in the warning strobe light field. Providing customers with various products is also one of our company’s service trends.

In our website, you can see some samples of our products including regular strobe lights, heavy duty strobe lights and LED rotating beacons. Please click the icons below to get more details about our amber strobe light. Hope you can find the specific item to meet your need. Should you have any specific needs or questions in regards to our products, please contact Ching Mars as soon as possible.

If you are planning to buy a quality LED flashlight, you should make sure that it would be able to provide good and clear lighting. There are many flashlight manufacturers in the market, who are providing super bright LED, which can be used in dark areas. These LED are capable of lighting up to 300 meters. This is a marvelous discovery of the new and advanced technology. Even though LED was in the market from many years, most of the people did not know the real benefits of it. As people started using it for different purposes, LED manufacturers started producing more advanced and powerful LED lights.

However, installing LED to cars has become a new trend today. Most of the people who look for an option to modify their cars and other vehicles use LED bulbs. Even though most of the people use the ordinary LED bulbs, few opt for super bright LEDs, which will provide them more power beams than the ordinary ones. These LED come out with four output levels; therefore, you have an option to set it to low, medium, high or with turbo.

If you research on the web or visit your nearby store, you will be able to find different types of super bright LED, which are obtainable in different colors. Apart from the car modification, LED is also used for many industrial purposes. These bulbs can be also fixed for bikes with the help of a LED kit. Finding the right accessories for your vehicle is very important as it might nhance your driving experience.

Super Bright LEDs

Article Source: http://EzineArticles.com/?expert=Faisal_Farrukh

Article Source: http://EzineArticles.com/3710498

If you are planning to buy a quality LED flashlight, you should make sure that it would be able to provide good and clear lighting. There are many flashlight manufacturers in the market, who are providing super bright LED, which can be used in dark areas. These LED are capable of lighting up to 300 meters. This is a marvelous discovery of the new and advanced technology. Even though LED was in the market from many years, most of the people did not know the real benefits of it. As people started using it for different purposes, LED manufacturers started producing more advanced and powerful LED lights.

However, installing LED to cars has become a new trend today. Most of the people who look for an option to modify their cars and other vehicles use LED bulbs. Even though most of the people use the ordinary LED bulbs, few opt for super bright LEDs, which will provide them more power beams than the ordinary ones. These LED come out with four output levels; therefore, you have an option to set it to low, medium, high or with turbo.

If you research on the web or visit your nearby store, you will be able to find different types of super bright LED, which are obtainable in different colors. Apart from the car modification, LED is also used for many industrial purposes. These bulbs can be also fixed for bikes with the help of a LED kit. Finding the right accessories for your vehicle is very important as it might nhance your driving experience.

Super Bright LEDs

Article Source: http://EzineArticles.com/?expert=Faisal_Farrukh

Article Source: http://EzineArticles.com/3710498

Nowadays, LED lights are becoming popular and utilized in several applications. Ching Mars Corp. is a professional manufacturer in LED warning light located in Taiwan. We manufacture kinds of warning lights, such as amber strobe light, light bar and siren, security strobe and signal light … etc..

The strobe light of Ching Mars is available in different colors: amber, red , blue and more color for clients to choose. We will keep working to supply the best innovations and services in the warning strobe light field. Providing customers with various products is
also one of our company’s missions.

If you are interested in LED warning lights, check our website and feel free to contact us. It’s our pleasure to answer any of your questions.

Ching Mars Corporation
Address: 10F, No.502, Da An Road, Shu Lin City, Taipei Hsien, Taiwan.
TEL: +886-2-86873877 /+886-2-26871660
FAX: +886-2-86873833
E-mail: sales@chingmars.com.tw

website: http://www.chingmars-strobe.com/