LED BULBS. SECRETS OF THE RIGHT CHOICE

LED BULBS. SECRETS OF THE RIGHT CHOICE

LED lamps quickly and confidently entered our life, their popularity is increasing every year, and the cost of production is steadily decreasing. Since the issues of energy saving are relevant for everyone, the replacement of incandescent bulbs with LED ones is a matter for the near future. How to choose LED light sources?


Advantages, disadvantages and features of LED lamps

LED lamps or LED lamps have their advantages and disadvantages, as well as features of use. The advantages are known to all: they consume little energy and their service life is more than 10 years, according to manufacturers.Additional advantages – they can have very small dimensions, do not heat up, work well in the cold, withstand vibration and shaking, and the utilization of such light sources does not harm nature – they do not contain mercury, like fluorescent lamps.

LED bulbs

The disadvantages include the rather high cost and the presence of the effect of degradation. During operation, the LEDs lose their properties (degrade) and their brightness decreases. If the LED has lost more than 30% brightness, it is considered out of order. At high temperatures, this phenomenon is more pronounced.

Very often, the disadvantage of LED-lamps is considered an unpleasant bluish tinge of LED lamps. In fact, this is not a disadvantage – it is a feature. If this light is annoying, then you can always buy a lamp with a warmer yellowish-white glow.

The features also include the narrow directivity of the glow of LED lamps.Yes, the LED emits in one direction. But the design of the lamp can include a different number of LEDs, can have a lens or do without it. Spotlight is ideal for spotlights and flashlights, and for a chandelier it’s better to choose light bulbs that give diffused light.

Features of light sources should not be considered disadvantages. You need to understand how to use them correctly. However, ordinary incandescent bulbs also have a peculiarity – they get very hot. Powerful lamps can melt a plastic cover and even set it on fire. In spite of this, they are used everywhere, and no one comes to mind to make a homemade paper or fabric lampshade on them.

For most of us, the issue of price does not require discussion. Everything is clear here. There is money – why not buy LED lamps? See, evaluate and draw conclusions independently. No money – nothing to talk about, you need to find the cheapest incandescent bulbs and use them.

Much more interesting is the topic of security. Health is most important, so everything that is known about the possible dangers of LED radiation per person should be found out before going to the store to buy economical light bulbs.

How does the LED lamp?

LED-lamp is a rather complicated light-emitting device. The radiation source is LEDs – semiconductor devices that convert electrical energy into light.They can not be connected directly to the network, so each lamp contains a board with built-in LEDs inside, an electronic driver for converting power from the network, all this is built into a metal radiator for cooling. Outside there is a base of a certain type for connection to any standard luminaire and a protective cap, matte or transparent, usually it serves to diffuse light.

LED lamp socket

All LEDs, depending on the chemical composition of the crystal, emit light of a certain hue. But not white.White is a mixture of all the colors of the spectrum. To get white light, apply different technologies:

  • many red, blue and green LEDs are placed on the same matrix, the radiation of which is mixed using a lens;
  • cover blue or ultraviolet LEDs with phosphor, absorbing and converting radiation into white light;
  • Yellow-green or green with a red phosphor is applied to the blue LED, resulting in two or three emissions, forming a white or close to white light.

What color radiation from a particular light bulb can be found on a scale on the packaging. There is a color temperature in degrees on the Kelvin scale, and for convenience there is a color scale on which color is marked. For most people, white light with a yellowish tint is comfortable.

What else is useful to know

A different radiation spectrum acts differently on people, animals, and plants.For example, the use of red and blue LEDs in combination allows you to create a spectrum of radiation that promotes rapid growth of plants. Such LED lamps are used in greenhouses.

Inexpensive ultraviolet LEDs coated with phosphor give white light a little bluish tint. Such a glow, oddly enough, activates the human body, provokes an increased release of the hormone serotonin, which increases efficiency.But such artificial excitement leads to irritability, because a person needs to rest … In a bedroom, such a light bulb will probably be inappropriate.

A big plus of LED-lighting – LED light does not flicker, like fluorescent fluorescent lamps. However, this applies only to high-level products with high-quality power supplies (drivers). Manufacturers of cheap light bulbs save, their products pulsate no worse than fluorescent ones. Flicker can not be seen, but it has a harmful effect on vision. Read more about the safety of LED lamps at safetydom.net .

How to choose an LED lamp

Buy LED-lamp is not a problem. But there are many different ones. They differ in power and shape, base and shade of light. And for the price too different. What to take?

How to calculate lamp power

Each lamp is designed for lamps of a certain power and size, they must have a corresponding base, all other parameters are chosen at their discretion.

To the room was bright, you can pre-calculate the power of the norms depending on the area of ​​the room. Or pick up light bulbs “by trial and error.”Since most of us know which incandescent lamps or “housekeepers” are already used, the LED lamps are selected from this table.

LED lamps, watts

Incandescent lamps, watts

Energy-saving lamps, watts

3-6

20-45

9-15

6-8

45-75

15-25

9-12

75-100

25-50

How to choose a lamp base

The base is the place where the lamp is inserted or screwed into the lamp.When buying a new chandelier, they usually purchase light bulbs for it in the same store. The seller will select and advise. Choosing for an old chandelier or a sconce, they do it like this: they twist a light bulb out of it and take it with them to the store. There are not so many types of bases, you can simply remember them visually.

LED lamp socket

Tips for choosing a quality LED lamp

First and foremost, well-known manufacturers of LED lamps supply proven and certified products to the market and provide a guarantee for several years. Such light sources can be trusted, they are safe for health. It is better to give preference to popular brands, for example, Philips, Gauss, Kreonix, Shine, Verbatim, Panasonic, Osram, etc. All sorts of fakes are cheaper, but due to which they are cheaper, it is not known. Whether they are harmful to health is also an unanswered question. Here are some useful tips from 1000sekretov.net:

    • Do not buy cheap lamps. Prices from different manufacturers of quality products are about the same. If the light bulb has the same parameters as the branded one, but its price is two times lower – pass by. This is a poor-quality fake. It may be unsafe.
    • Check for flicker. You can spend a simple experience, namely, look at the lamp through a digital camera. It is possible through the camera of the smartphone. On the screen you can immediately see the pulsating light (strobe effect).

 

  • Do not buy a lot of lamps at once. A purchased LED lamp is best appreciated at home – whether the shade of the glow is suitable for all family members, whether there is enough diffused light or harsh. Check again for flicker. If any flaws or unpleasant features are noticed – its place is in the hallway, toilet or on the veranda. If the purchase is successful – buy the bulbs of the same company as much as required.

LED light sources will significantly save electricity bills and allow you to forget about replacing burnt out light bulbs. You just need to learn how to choose them correctly.