How to judge the quality of lighting fixtures?

Look at the brightness of the fixture:

Generally, the brightness of high-power LEDs will be much brighter than those with small power, and at the same time, it will be much more expensive.

Look at the antistatic ability of the lamp: LED with strong antistatic ability has a long life. Usually the antistatic is greater than 700V LED can be used for LED lighting.

2.Look at the luminous angle of the lamp:

LEDs emit different light angles depending on their use. Depending on your needs, it is important to choose the right application for your own purchase. Therefore, it is necessary to have an understanding of the application site you purchased.

3.Understanding the wavelength of the luminaire:

LEDs with the same wavelength and the same color will be relatively high. We should be aware that it is difficult for manufacturers without LED spectrochromators to produce products with pure colors, so we must choose products made by reputable manufacturers.

4.Understanding the leakage current of the luminaire:

LED is a single conductive light-emitting body, if there is a reverse current, it is called leakage, the leakage current is large LED, the life is short, and the ** is also relatively low.

5.Chip that identifies LED luminaires:

LED luminaire for the chip, different chips, generally ***** expensive chips are imported from abroad, rich recommended to buy, relatively not abundant funds can buy domestic famous brands.

6.Chip size:

The size of the chip is expressed in terms of side length, and the quality of large chip LEDs is better than that of small chips. **Proportional to chip size.

7.Understanding the colloids of luminaires:

The colloidal body of ordinary LED is generally epoxy resin, and the LED with anti-ultraviolet and fire-retardant is more expensive, and high-quality outdoor LED lighting should be UV-resistant and fire-resistant.

8.Learn about luminaire power supplies:

According to the design requirements of different manufacturers, it can be divided into constant current power supply and constant voltage power supply, no matter which one, the power supply plays a central role in the service life of the whole lamp. If the lamp will break, it is usually the power supply that burns out.

9.Understanding Luminaire Radiators:

The radiator can look at the appearance of the lamp, if the external or built-in lamp is made of aluminum, it may solve the thermal effect of the lamp to better extend the life of the lamp, temperature plays a key role in the service life of LED lamp beads.

Is 1 full power? There are many false bids for low prices; 2. What is the light effect? Generally, under the same conditions, low-quality chips emit less light; 3How to dissipate heat?

The heat dissipation effect of the plastic shell die-cast aluminum professional radiator is definitely different, which directly determines the service life. 4. What is the effect of light distribution? The matte has a soft light, but low utilization; Specular reflection can illuminate very brightly, but it is dazzling and large; There is also a kind of glass lens light distribution (convex lens principle), which is small in size, high in light utilization, and easy to adjust in irradiation range, but it is expensive.

5. In terms of power supply, conversion efficiency, output stability, circuit design, component materials, circuit protection measures, circuit heat dissipation design, etc., it is more complicated and difficult to judge, but generally from the appearance, what the grade looks like, how the workmanship is, and whether the parameters are detailed can also be basically judged.

LED lamps and lanterns believe that many people are no strangers, and now many families are also using LED energy-saving lamps, because LED lamps have obvious power-saving effects, long service life and no radiation, no strobe effect, no noise, soft light, wide range of working voltage, etc., and are increasingly popular with consumers. However, there are a lot of LED energy-saving lamps on the market, because many LED industry specifications have not been perfected and introduced, many companies think that buying some chips and buying some lamps and lanterns are LED technology companies as soon as they assemble them, which leads to the uneven quality of products on the market. As a consumer, how can you buy a product that you are satisfied with in the dazzling array of LED energy-saving lamps in the lighting store?

How do you know that the LED lighting products you buy are qualified?

First, look at the packaging and trademark

The state mandates LED lamp manufacturers to mark the following on the outer packaging: rated voltage, voltage range, rated power, and rated frequency. Generally speaking, the trademark printing of high-quality products is clear, the fabric is off, wiped with a soft wet cloth, the logo is clearly recognizable, the fabric is wiped off, and the manufacturer's trademark and related certification marks are available.

Fake and shoddy products have poor printing quality, blurred fonts, easy to erase, and no manufacturer's trademark and related certification marks.

Second, look at the appearance of the LED tube

The real LED energy-saving lamp is made of three primary color tubes, the tube is white, and it is whiter to cover it with your hands. In addition, from the perspective of the lamp, a number of lamps can be compared together, and the shape and size consistency of the lamp tube are mostly bent and formed by machines, and most of them are mass-produced products. The consistency of the product is good, the quality is easier to guarantee, and the interchangeability during maintenance is better.

Of course, there must be no cracks, loosening or signs of prying between the joints. In the process of installation and disassembly, the lamp head should not be loose or crooked.

The plastic shell of the lamp must be made of the engineering plastic flame retardant type. Ordinary plastics are easily deformable and flammable, and are prohibited from being used in the production of energy-saving lamps. On the surface, the latter has a smoother and shiny surface, and the former has a texture similar to frosted glass.

3. Look at the temperature at work

LED energy-saving lamps should have a very low temperature rise under normal working conditions. Otherwise, LED energy-saving lamps have a short lifespan. At the same time, when the energy-saving lamp is lit, there is a quick flash, or it is very dazzling fluctuations, which indicates that the energy-saving lamp has quality problems.

Fourth, look at the startup performance

LED energy-saving lamps have two characteristics to start: first, the higher the temperature, the easier it is to start; The second is that the light is turned off and will not flash. In addition, it is worth mentioning that many LED energy-saving lamps are very dark when turned on, which is not good for the life of the bulb, and LED energy-saving lamps should be equipped with power circuits and PCB boards inside.

Fifth, look at the interference

In our country, electromagnetic compatibility has been an electrical appliance must pass the project, however, this project detection is very complicated, when the user buys the lamp, look at whether there is a sign on the package that has passed the national electromagnetic compatibility test, the second is to bring a short and medium wave radio, when the lamp works, the radio is placed nearby, the lower the noise of the radio to be short-wave without a radio station, the better the electromagnetic compatibility of the tested lamp.

The first is to look at the color of the lamp: after the light is lit close to the palm of the hand, if the palm is still the original ruddy color is a qualified lamp, if the palm becomes green and gray, it is an unqualified lamp. Good lamps are not only energy-efficient, but also have healthy light and color, are comfortable and protect eyesight.

And the inferior lamp is like a layer of fog when you look at things at night.

Then look at the appearance: whether the brand, model, rated voltage, rated power and other contents of the lamp are complete; Whether there is protection at the output hole of the wire, there should be no sharp edge, otherwise the wire will be cut and conductive.

It depends on whether it is a brand or not. How bright. Is there a warranty.

Look at the workmanship of each part of the lamp, look at the details, a good lamp looks comfortable; Two touch, touch the lamp, you will know how it feels, three standards, look at various labels, lamp head mark, CC mark, certificate and so on.

1.Attention should be paid to the markings on the product:

1) See whether the manufacturer's name and trademark, model, rated voltage, rated power, etc. are safe;

2) Ceiling lamps, wall lamps, table lamps, floor lamps to be installed on the surface of wooden materials, and lamps marked with the F symbol.

2.Identification from protection against electric shock:

Attention should be paid to protection against electric shock. When the bulb is screwed in, after the lamp is energized, people will not be able to touch the live parts, and there will be no risk of electric shock.

If you buy incandescent lamps (such as chandeliers, wall lamps), install the bulb, and if there is no electricity, if you can't touch the lamp head on the bulb with your little finger, the anti-electric shock is basically compliant. If it is a fluorescent lamp (such as a recessed lamp, a fixed lamp), when installing the lamp and the starter, if the live parts cannot be touched with the little finger without power, the anti-electric shock performance is basically in line.

The non-compliance of the anti-electric shock of the lamp is generally caused by the use of anti-electric shock protection measures such as lamp holders that do not meet the requirements or live parts of the lamp without covers.

3.Identification of the cross-sectional area of the wire used in the lamp: the standard stipulates that the minimum cross-sectional area of the wire used on the lamp is squared, and some manufacturers in order to reduce costs, the cross-sectional area of the wire used in the product is only squared, in an abnormal state, such as the fluorescent circuit in the starting current can not jump, the whole line will work with the starting current, the starting current is larger than the normal working current, which will make the wire scorched, and the insulation layer will be burned out after the short circuit, resulting in danger.

The method of identification is: When purchasing, you can look at the marking printed on the insulation layer outside the wire on the lamp, and the cross-sectional area of the wire should be at least square.

First of all, identify from the appearance of the lamp. When purchasing lamps, consumers should first check the marks on the lamps and lanterns to determine whether they meet their own use requirements. 1) See whether the manufacturer's name and trademark, model, rated voltage, rated power, etc. are safe; (2) Identification from anti-electric shock protection:

Attention should be paid to protection against electric shock. (3) Identification of the cross-sectional area of the wire used in the lamp: the standard stipulates that the minimum cross-sectional area of the wire used on the lamp is squared, and some manufacturers in order to reduce costs, the cross-sectional area of the wire used in the product is only squared, in the abnormal state, such as the starting current in the fluorescent circuit can not jump, the whole line will work with the starting current, the starting current is larger than the normal working current, which will make the wire scorched, and the insulation layer will be burned out after the short circuit, resulting in danger.

Secondly, it is identified from the structure of the lamp. (1) The entrance and exit of the metal pipe through which the wire passes should have no sharp edge, and the measures can be chamfered or sheathed on the metal parts to avoid cutting the wire, causing the metal parts to be electrified and causing the risk of electric shock. (2) Whether the appearance of the structural parts of the lamp is worn or damaged; whether the fastener screws are tightly installed; Gently shake the lamp to see if there is any abnormal noise.

Finally, you can directly find the merchant to test, light up, and make the final function judgment. In short, when consumers buy lamps and lanterns, they should choose products with safety certifications as much as possible, and they must carefully identify and choose.

First: look at the appearance of the lamp, the general poor quality of the product is only ** plastic, you can see at a glance, fragile, and toxic, the general knocking sound is very brittle, like the feeling of knocking down, the appearance is very good-looking, some are still painted paint, giving people a very thin feeling, very toxic Oh, he shows a very good finish, a little better is the domestic ABS plastic, anti-impact strength, and durable, generally mid-range products are used, but the finish is slightly worse, the best is imported ABS plastic, Not only is it impact-resistant, but it is also non-toxic, and there are strict assessment procedures.

Second: many good product lamps generally use rare earth fluorescent tubes in three primary colors, and the effect reflected is very soft. The poor quality ** cheap ones generally use halogen powder lamps, the lights are very white, and the hands look very white under the light, like a dead person, losing their blood color.

Dear friends, the difference between rare earth and halogen powder is too big, at least 5 times more. This is the reason why some products are sold very cheaply.

Third: If you are interested in opening the machine and looking at the circuit, you will understand that the poor quality circuit is so poor that it is simply produced by the screwdriver in the factory. The electronic ballast of the good product is made of high-quality epoxy glass fiber fireproof PCB circuit board, and 100% of it is treated by ultra-high pressure aging process.

Generally, the repair of products with poor circuit plates is very high, and the repair of good circuit plates is very low.

Fourth: but also to use the eye protection lamp correctly, many people think that the use of eye protection lamp only open the eye protection lamp, in fact, it is a misunderstanding, if you open the eye protection lamp alone, the surrounding darkness, is not good for the eyes, the reason is very simple, because the light difference is too large, the burden of the eyes is too heavy, but it increases the burden of the eyes, more fatigue, the correct way to use, at the same time as turning on the eye protection lamp, to open a general lighting, so that the eye protection effect is the best, in order to prevent myopia, relieve eye fatigue, This is something that many people often misunderstand.