LED "corn" lamp: reviews

LED or LED lamps have been used relatively recently, but are already very popular. At the same time, many buyers are unhappy with the operation of these devices. In addition, there are rumors about the dangers of LED lamps for human health. How true are these statements? How to choose the right LED lamp?

Description

In appearance, the LED lamp is similar to an incandescent lamp with a socle, and on the housekeeper - a contour outline. It consists of LEDs, an optical system and a semiconductor crystal (or two) on a substrate.

According to the principle of action, it is a semiconductor device that converts the voltage of an electrical network into light. The name LED is a shortcut to the concept of Light Emitting Diode.

These technologies are now actively developing around the world. There are new areas of use of LEDs. Improves the quality of light produced by LED lamps.

Advantages of LED lamps

What will the user have, replacing the incandescent lamps with modern LED lights?

• The bulbs do not heat up;
• Strong;
• lungs;
• Do not contain mercury, as "housekeeper";
• Do not emit ultraviolet radiation harmful to the eyes;
• Warm up in less than 1 second.

A 10-watt LED lamp illuminates the room in the same way as a 100-watt incandescent lamp.

If you compare lamps of the same brightness, then LED-lamps, or LED, consume less energy than incandescent lamps, 10 times and 2 times less than energy-saving (luminescent).

But these lamps have one undoubted negative: the cost of a single LED is much more than a luminescent and even more incandescent. What is the saving then?

The resource of LED lamps is from 50 thousand hours. This means that the lamp, which is used every day for a long time, will serve the owners for 10 years. And the one that is included from time to time, can serve 50 years!

Therefore, real savings will be felt quickly enough. For a year and a half the cost of lamps will pay off, and it will work for many years. Although the quality of light deteriorates with age. So, after 25 thousand hours of operation, the lamp will give 10 or 20 percent less light.

The use of LED lamps will save energy for electricity by 70%.

This will lead to the fact that it will not be meaningful to turn the lights on and off when leaving the room.

In addition, one more problem will be solved. Every year in our apartment or house is becoming more and more electrical appliances. Often the network is not designed for such a number, there are overloads and, as a result, fires. After replacing conventional incandescent lamps with LED voltage, the wiring will be significantly reduced.

LEDs

• LEDs of medium power SMD 5630, SMD 5730 have an excellent luminous flux.
• SVL 5630 is the next generation LED. It contains two crystals, so the power is 1W. The luminous flux of such LEDs is 158 Lumens per Watt.
• LED SMD 5050 can also be equipped with a super bright crystal.

Parameters of LED lamps

In addition to the power denoted by letters W or W, the quality of the bulb is characterized by the amount of light (light flux), the power of the emitted light. It is measured by lumens (Lm, Lm). If the power value should be as low as possible, then the illumination level should be larger. The rays of the lamp's light can disperse in all directions, and can be directed by a narrow beam. In order for the lamp to be comfortable, it is necessary that the angle of dispersion of the light be not less than 150 °.

The color of light is of great importance. It can be determined from the indicator of the temperature of light, which is measured in ° K. The higher the number, the whiter the color. For household use, lamps with a color temperature of 2700 to 3500 ° K are suitable. They produce a yellowish light that does not irritate the eyes.

Most corn lamps sold through Aliexpress have low-power diodes. They are much weaker than branded ones, from Samsung, Phillips, LG. Chinese manufacturers indicate that this is Samsung products. And after the lamp is bought and starts to burn, it turns out that its power and brightness is several times smaller.

Price of LED lamps

The cost of LED lamps for domestic use ranges from 200 to 1000 rubles. There is more. It depends on the technical characteristics and the manufacturer. So, the price of street lamp E40 can reach 17 thousand rubles.

It is predicted that the prices for LED lamps will decrease, and after a while they will become much cheaper.

Guarantee for LED lamp

And what happens if the LED lamp does not burn before the warranty expires? Usually it is 3-5 years. You can replace it in the store where you bought it.

But for this you need to present a check and a box in which the lamp was packed. Usually the date of purchase is indicated on it. Please note that the guarantee for energy-saving light bulbs is 2 years, and there is no lamp at all.

LED Corn Light

The Ecola LED corn lamp, which can be screwed in place of an ordinary incandescent lamp in an apartment building, can be equipped with E27 socket. The number 27 denotes the diameter in millimeters. They operate on a voltage of 220 V. There are two types:

• With a bulb;
• The lamp is LED "corn".

This name was given to the lamp because of its appearance. It is oblong, similar to the ear of corn. On its surface is a large number of yellow LEDs, reminiscent of the grains of this crop.

The LED "corn" lamp is called corn led bulb. This is the name of these devices in foreign online stores.

Produce LED LED lamps (corn) in China.

There are three groups of LED lamps of this type:

• Large on diodes of 0.15 W: this is SMD 5630, 5730, 5050;
• Small on LED-diodes of 0.08 W;
• On COB LEDs.

A large LED "corn" lamp for 42, 44 and 60 LEDs is reliable in operation. To find out its real power, multiply the number of LEDs by 0.15 W (power one). Although users note that over time, the light flux is reduced, by about 30% in two years. The plastic slightly turns yellow, but this does not affect the quality of the work. Elements are located on a metal plate that removes heat. Sometimes the E27 LED "corn" lamp flashes and cracks after switching on. This may be due to the fact that the bridge rectifier is poorly defective.

User reviews indicate that the "corn" LED E27 lamp has a 360 ° dispersion angle. This is better than any bulb lamp.

You can even parse it to fix the problem. It turns out that the plastic hood can be easily removed and put on if it snaps into place.

Lamps with a plastic bulb

On top, the LED "corn" lamp can be closed with a plastic bulb. At the end there are small openings for the air to come to the LEDs and cool them. Buyers' comments say that the lamp is not hot, but it still heats up a bit. Lamps can be easily taken in hand while they are on (for example, unscrewing from the cartridge).

User reviews say that these small lamps with plastic flasks are not very high quality. They:

• They are heated because of the small size and the bulb.
• LEDs are mounted on a PCB, which does not contribute to the removal of heat.
• They are placed very close to each other, so the textolite sometimes even burns out.
• Almost half of these lamps cease to shine after a few months because of the burned LEDs.

Lamps on SOV LEDs

It differs from other "corn" with a large size of LEDs. Accordingly, their number is less than that of the previous ones, and they are less similar to corn.

LED Light Bulbs E14

Many modern lamps and chandeliers have a base with a diameter of 14 mm. For such devices use LED lamps - "corn" E14. Good lighting is provided by 9W lamps. Their price is about 200 rubles. a piece.

Find LED bulb-bulbs E14 of the same power is difficult. Usually this is 5-6 W, and the illumination is up to 500 lm. It is not enough for high-quality lighting of the room.

LED lamp E40

LED lamp "corn" E40 is used for street lighting. They replace sodium high-pressure lamps . They serve 4 times longer than sodium. In addition, light output is reduced by 30% after 50 thousand hours of operation. And in sodium at 50% after 2 thousand hours. In addition, they require additional equipment (control gear). And LED only needs a driver already built into the lamp. It allows the lamp to not respond to voltage surges. The radiator lowers the temperature of the LEDs. This lamp operates at a temperature of -40 to 50 degrees.

Advantages of "corn"

• It is easy to calculate the lamp power by multiplying the power of one LED by their number.
• LEDs do not blind the eyes, because they are arranged in a circle. Therefore, a matt flask, which reduces the brightness from 20 to 50 percent, is not needed for a lamp.
• They have an excellent dispersion angle (360 °).
• Lamps are easily disassembled and repaired.
• Does not require cooling, so their price is lower.

disadvantages

• The main disadvantages lie in the non-compliance with fire safety rules. These open contacts are live. Although it is small, not dangerous for life.
• Some users do not like the quality of the light emitted by the LED lamps. You need to buy a lamp with a light temperature of about 3000 ° K.
• Customer testimonials indicate that the driver on the capacitor causes high ripple when working in the 220 V network. To correct this at a frequency of 100 Hz it is possible by soldering one more capacitor for stabilization.