How to identify led lamps and lanterns whether the glare is great, is there a standard?

Glare can be categorized into disabling glare and not arrow appropriate glare. Any glare that reduces the visual acuity of the human eye is known as incapacitating glare, which will

reduce the visibility of the visual object, but does not necessarily produce an uncomfortable feeling; any glare that makes people feel unhappy is known as uncomfortable

comfortable glare.

The reasons for the glare from led lamps are the following four main factors.

(1) light source brightness factors: the higher the brightness, the more significant the glare.

(2) The location of the light source: the closer to the line of sight, the more significant the glare.

(3) The size and number of light source appearance factors: the larger the apparent area, the greater the number of light sources, the more significant the glare. (4) Factors of the surrounding environment: the darker the environmental brightness, the lower the brightness of eye adaptation, the more significant the glare.

Glare is not meant to be a light source, but a concept used for lamps. At present, led-t8 fluorescent lamps have risen and are replacing the market of ordinary

common fluorescent lamps, because the lamps are ready-made and cannot be changed, led-t8 fluorescent lamps need to be close to the effect of ordinary fluorescent lamps

fruit, which gives rise to the concept of glare. Anti-glare products, need to consider the brightness of the led, led between the row

cloth, spacing, the distance from the led itself to the optical enclosure, the shape of the optical enclosure, transmittance, etc., rather than simply the outer

shell or row of the problem.

LED advantages and disadvantages:

LED advantages

1. Small size

LED is basically a very small wafer encapsulated inside an epoxy resin, so it's very small and very light.

2. Low power consumption

LED power consumption is quite low, DC drive, ultra-low power consumption (single tube 0.03-0.06 watts), electro-optical power conversion close to 30%. Generally speaking, the working voltage of LED is 2-3.6V, and the working current is 0.02-0.03A; that is to say, it consumes no more than 0.1W of electricity, and the same lighting effect is nearly 80% energy-saving than traditional light sources.

3. Long service life

Some people call the LED light source for long life lamp. It is a solid cold light source, epoxy resin encapsulation, there is no loose part of the lamp body, there is no filament light easy to burn, heat deposition, light decay and other shortcomings, in the appropriate current and voltage, the service life of up to 60,000 to 100,000 hours, more than 10 times the life of traditional light sources.

4. High brightness, low heat

LED using cold light-emitting technology, heat is much lower than ordinary lighting.

5. Environmental protection

LED is made of non-toxic materials, unlike fluorescent lamps containing mercury will cause pollution, while LED can also be recycled. There are no ultraviolet and infrared rays in the spectrum, neither heat nor radiation, small glare, cold light source, safe to touch, belonging to the typical green lighting light source

6.Ruggedness and durability

LEDs are completely encapsulated in epoxy resin, stronger than the bulb and fluorescent tubes. There are no loose parts inside the lamp, making the LEDs less susceptible to damage.

7. Multi-variable

LED light source can use red, green, blue three-color principle, under the control of computer technology so that the three colors have 256 levels of gray scale and arbitrary mixing, which can produce 256 × 256 × 256 = 16777216 kinds of colors, the formation of different combinations of light color changeable, to achieve colorful and dynamic changes in the effect of the image and a variety of images.

8. Advanced technology

Compared with the monotonous luminous effect of the traditional light source, LED light source is a low-voltage microelectronic products. It successfully integrated computer technology, network communication technology, image processing technology, embedded control technology, so it is also a digital information technology products, semiconductor optoelectronic devices, "high-tech" technology, with online programming, unlimited upgrades, flexible and versatile features.

LED shortcomings

1. Toxic element content

LED lamps contain antimony, arsenic, chromium, lead, and a variety of other metal elements. Among them, the toxic element content of some LED lights has exceeded the standards set by the regulatory authorities. For example, in low-brightness red LED lights, researchers found that their lead content exceeded the standard by up to eight times, and nickel content also exceeded the standard by 2.5 times.

In fact, in California law, the vast majority of LED lights have been clearly defined as toxic waste, which can contaminate soil and groundwater if disposed of in landfills. If the LEDs are broken, they may also cause damage to human health in the event of direct contact, with arsenic, lead, nickel, and copper in the LEDs having the most serious impact on the human body and the environment.

2. Light-emitting surface is relatively narrow

LED needs due to the individual light-emitting surface is relatively narrow, usually large-scale integration in the circuit board, to form a relatively large light source, which will result in the accumulation of a lot of heat, and sometimes will break through the circuit board. So the heat dissipation of LED lights must be good.

3. Harmful to the eyes

The human eye is the most unacceptable is the blue light and UV light (i.e., ultraviolet light), blue light kills the ability of human eye active cells is 10 times the green light, while the UV light kills the ability of human eye active cells is 10 times the blue light, long-term exposure to a large number of low-wavelength blue light can be a large number of kill the ability of human eye active cells, and ultimately cancerous plaque formation. LED white light formation is mainly by 450-455NM wavelength blue light excitation phosphor, which the lower the wavelength the stronger the ability to strike, usually the wavelength of the LED factory control within 500NM, i.e., 450-455NM, or 455-460NM, belongs to the strongest damage to the band, if the wavelength becomes bigger, then the ability to excitation of the phosphor decreases, the efficiency is reduced. People in pursuit of brightness, usually more will strengthen the blue light intensity of the LED, the longer the lighting time, the faster the phosphor attenuation, which in turn leads to the human eye exposure to the blue light band of light the more intense, thus causing damage to the human eye.

So LED lamps in road traffic LED navigation instructions, LED street lamps, LED desk lamps on the use of certain unfavorable factors, easy to make people in the use of the process of dizziness, uncomfortable feeling, and even long-term use of the eye will become eye damage, making the chances of suffering from eye disease will be increased.