Disassembling: A19 LED light bulbs expensive secret

Today, most lamps and light sources using standard A19 light bulb size, and now these lamps have aLEDVersion, but expensive. For example, the equivalent of 40W or 60W bulbsBrightnessOf LED Bulbs, its retail price was $ 20 and $ 40. SomeLED lights dimmable, and some is not adjustable; some only a few specific LED lights dimming file. Usually three or four hours in the conditions of use, these LED light bulbs are claimed to have 25,000 to 50,000 hours life expectancy. If used properly and sparingly, these LED lighting bulbs are also likely to live longer than the user. However,LED bulbs Why so expensive? Are they really worth it?

In the component analysis to find scientific answers to the company MuAnalysis process, we were dismantling the five A19 LED bulb: where 1 is the Philips Products (12.5W/800Lumen), Equivalent to 60W regular bulb; the other four were from Feit, GE, Pharox and Sylvania products, equivalent to 40W regular bulb. By dismantling these five bulbs, we found lot of problems.

LED bulbs in each package with a special design, and CFL bulbs with tungsten coated heat-shrinkable packaging, these LED bulb cool packaging to increase the overall cost. Obviously, these bulbs give way yet to figure for the general merchandise; them expensive, and this trend is expected to continue.

However, in the current rapid decline in prices of electronic products of the environment, long life is no longer the sole focus of attention. So, why a light bulb a low-cost product than we have digital cameras expensive?

For such a simple product like a light bulb, the appearance is definitely a selling point. We study the dismantling of every appearance of LED bulbs are unconventional. For example, GE light bulbs with ceramic lining the neck and wings, with a glass stem and base, which more than plastic and metal products and high cost.

All bulb lights are equipped with a small neck printed circuit board, a large volume of electrolytic capacitors and transformers?? Is essential to the protagonist of the board. LED spotlight reliability factor has been greatly improved; However, in the heat of the working conditions, the electrolytic capacitor can have a long life?

Dimmable bulb Infineon or STMicroelectronics Of Power Transistor. In these lamps, we did not find silicon carbide technology.

Each lamp usesLED DriverICAre different. Pharox using four IC, 40 resistors and 16 capacitors, plus a transformer and a number of diodes. All this is equivalent to 40W for a dimming of the LED light bulb, of course, but in some cases, when you are old may not be compatible with dimmers only when the need to buy a new dimmer.

Philips uses a tiny phosphor encapsulation material depends on the wavelength conversion bulb. Lamps in more than a lutetium oxide is used as a fluorescent medium. Over the past few years, we pay attention to many kinds of LED bulbs, but has not seen with the lutetium element. Which uses such as barium and cerium-doped YAG(Yttrium aluminum garnet) phosphor and other more traditional, there is also other rare earth elements, such as europium and strontium.

Surprisingly, these LED Ceiling Light use a blue GaN LED, did not use the RGB LED. In Pharox products, and with a red LED Lens, But the lamp is on, the red LED does not work. Clearly, these red LED Ceiling Light is not used for color balance. Perhaps, only when the light bulb to be bad when it turns red bulb; bulbs or wiring used to indicate an error.