Energy saving features
LED light source with high luminance efficiency
Comparison of luminous efficiency: incandescent light efficiency is 10-15lm, tungsten halogen light efficiency is 12-24 lumens/watt, fluorescent light 50-90 lumens/watt, sodium light 90-140 lumen/watt, most of the power consumption becomes heat loss.
LED light efficiency: It can emit 50-200 lumens/watt, and its light emission has good monochromaticity and narrow spectrum. It can emit visible colored light directly without any filtering.
2.LED light source consumes less power
Single LED tube power ranges from 0.03-0.06 Watts when driven by DC. The single tube voltage is between 1.5-3.5 Volts. The current 15-18 mA is a high-frequency device that has a quick response time and enables it to be operated with varying frequencies. When used with the same lighting effect, the power consumption is one ten thousandth of that of incandescent lamps and one half of that of fluorescent tubes. It is estimated in Japan that if it is used LEDs, which are twice as efficient as fluorescent lamps, can replace half of Japan’s incandescent and fluorescent lamps, saving the equivalent of 6 billion liters of crude oil every year. A fluorescent lamp with the same effect is more than 40 watts, while the power of each LED is only 18 watts. .
3.LED light source has long service life
Incandescent lamps, fluorescent lamps, and tungsten halogen lamps use electronic light field radiation to emit light. The filament emits light and is prone to burning, heat deposition, and light attenuation. LED lamps are small in size, light in weight, and encapsulated in epoxy resin, which can withstand high-strength mechanical impact and Vibration-resistant, not easily broken, with an average lifespan of 30,000-50,000 hours, the service life of LED lamps can reach 3-5 years, which can greatly reduce the maintenance costs of lamps and avoid the pain of frequent lamp replacement.
4.Strong safety and reliability
It is safe to touch and has a low calorific value. It can control the angle and pattern of light with accuracy.
Environmental protection is a benefit of LED light sources
LED is an all-solid-state light emitter, is impact-resistant and not easily broken, is recyclable, has no pollution, reduces the generation of harmful gases such as sulfur dioxide and nitrides, and greenhouse gases such as carbon dioxide, and improves people’s living environment. It can be called a “green lighting source.”
There are currently three technologies for producing white LEDs: one, which uses the principle of three primary colors and the three ultra-high brightness LEDs of red, green, and blue that can be produced to mix the light intensity in a ratio of 3:1:6 to produce white; the other, which uses ultra-high-brightness LEDs Highly InGan blue LED, with a small amount of yttrium-diamond-granite-based phosphor added to the tube, it can produce yellow-green light under blue light excitation, and this yellow-green light can be combined with the transmitted blue light to synthesize white light. All three are incompatible to ultraviolet light. Light LEDs use ultraviolet light to excite phosphors of three primary colors or other phosphors in order to produce a white light with multiple colors.
LED light source is energy-saving
Energy savings is the primary reason we are considering LEDs. LEDs are more expensive than conventional light sources. However, using the energy savings to pay back the investment will result in a net return of up to several times that amount in four to nine years.
life of lights
Constant current source driving is the best way to drive LEDs. Using constant current source driving, there is no need to connect a current limiting resistor in series with the output circuit. The LED current is not affected externally by changes in voltage, temperature, or LED parameters. The LED current is kept constant, allowing the many excellent features of the LED to be fully utilized.
An LED constant current power supply is used to power LED lamps. Since the current flowing through the LED is automatically detected and controlled during operation of the power supply, there is no need to worry about excessive current flowing through the LED at the moment of power on, or a load short circuit and burnout. Power supply failure.
lamp housing
LED lights have the characteristics of high efficiency, environmental protection and long life. People who use LED lights often will notice that LEDs can be very hot because they are so bright. At this time, if the LED cannot dissipate heat as quickly as possible, its lifespan will be greatly reduced.
LED manufacturers often use aluminum cases for LED lamps. Aluminum casings are easy to dissipate heat, have beautiful appearance and are lightweight. Aluminum casings are used in many high-end electronics. The company’s “Mac Pro” high-end notebook computers use an aluminum casing for heat dissipation. This means that the computer doesn’t need a fan.
Aluminum shells can extend the life of the LED wick, and also make it look more beautiful. The aluminum lamp cup, however, is expensive and has a high production cost. The lamp cup must be turned on a lathe. Some LED lights of high and medium quality will have aluminum housings.
Another common LED lamp housing is a plastic housing. Since the cost of plastic shells is very low, some low-end LED lamps will use plastic shells. Plastic shells do not dissipate heat well, and they tend to melt or sublimate when heated, producing harmful gases. Therefore, Europe, North America, and Japan do not use plastic casings. Plastic casings are popular in certain areas of the country due to the high demand for LED lights.
household lamp
Many LED lights can replace spiral incandescent lamps or energy-saving light bulbs, ranging from 5-40 watts, low-power incandescent lamps, to 60 watts (requiring only about 7 watts of electricity). Some lamps are able to replace even higher-power bulbs as of 2010. For example, a 13-watt light bulb has about the same brightness as a 100-watt incandescent lamp. Incandescent bulbs have an efficiency of 14-17 lumens/watt depending on the size and voltage. EU standards require that an “energy-saving lamp” equal to a 60 watt incandescent bulb must have at least 806 lumens.
The majority of LED bulbs are non-dimmable. However, some have dimmers that can be used and have a narrower illumination angle. Since 2010, the price of these light bulbs has dropped from $30 to $50. LED bulbs are more energy efficient than energy-saving light bulbs, and can last up to 30,000 hrs if the heat is properly dissipated. Incandescent lamps generally only have a lifespan of 1,000 hours, and energy-saving light bulbs only have a lifespan of about 8,000 hours. LED bulbs are able to be used for up to 25 years and their brightness does not decrease over time. The Energy Star standard stipulates that after a light bulb is used for 6,000 hours, the luminosity attenuation should be within 10%, and the worst case should not exceed 15%. LED bulbs do not contain mercury, unlike fluorescent lamps. LED bulbs also come in different color options. Although the selling price is higher, it is offset by lower electricity and maintenance costs.
Special Purpose
White LED bulbs have high efficiency and are a leader in the low-power consumption market (such as flashlights or solar garden lights for pedestrian street lighting, bicycle lights etc.). Single-color LED lights are often used to make traffic lights and holiday lighting.
LED lights were a popular topic in 2010 for horticulture, agriculture and other related circles. NASA was the first to use LED lights in space for indoor gardening. These planting lights have been designed to emit light waves that are identical to the wavelengths of chlorophyll. It not only encourages growth but also reduces the light waves which are not absorbed and cause waste. In the visible spectrum, only red and blue are needed for photosynthesis, so these lights are designed with both colors in mind. Compared with similar products, these LED lights can provide the same luminosity, do not require a ballast, and generate much less heat than gas discharge lamps, making them very suitable for indoor cultivation. Less heat can reduce evapotranspiration, thereby reducing the number of fillings. For this reason, when using these planting lights, plants should not be overwatered.
Guide to buying
- Choose LED lights with the “Three Guarantees” commitment and choose lamps with the CCC certification mark;
- The LED lamp productlabels must be complete. Labels should be placed on all products.
- The CCC mark is a safety certification that you can look for on the LED power cord.
- Check whether the live parts of the lamp are exposed. The metal lamp holder should not be touched by fingers after the light source has been installed.
- Check if the LED chip is in the correct position, and if the lens or screen has worn out.
Damage caused
- The voltage of the current is unstable. An increase in the power supply voltage is particularly likely to cause damage to the LED lamp. There are many reasons for a sudden increase in voltage, such as quality problems with the power supply or improper use by the user. The power supply voltage may suddenly increase. high.
- This is caused by a short circuit in the power supply of the lamp. This is usually caused by a component in the circuit or a short-circuit in other wires that increases the voltage in this place.
- The LED may be damaged by its own quality, causing a short-circuit. This voltage drop then spreads to the other LEDs.
- The lamp’s heat dissipation is bad. The lamp’s lighting is actually a process of heat dissipation. The characteristics of LEDs will easily degrade if the temperature in the lamp is high. This can also easily cause damage to the LED lights.
- It is also possible that water has entered the lamp, because water is conductive, which will short-circuit the circuit of the lamp.
- Failure to do anti-static work during assembly has resulted in the interior of the LED being damaged by static electricity. It is easy to damage the LED even if voltage and current are normal.
The common causes of LED flickering and their solutions
Normaly, the human eye is able to detect flickering light up to a frequency 70 Hz. However, it cannot detect frequencies above this. In LED lighting applications, If the pulse signal contains a low frequency component, with a lower frequency than 70 Hz the human eye can feel flicker. There are several factors that can cause LED lights flicker in certain applications.
For example, in offline low-power LED lighting applications, a common power supply topology is an isolated flyback topology.
The flyback regulator’s sinusoidal square-wave power conversion does not supply constant energy to primary bias. This can cause the dynamic self-power (DSS)) circuit to activate, causing the light to flicker.
To avoid this problem, the primary bias must be allowed to partially discharge during each half-cycle. The values of the resistors and capacitors in the bias circuit must be selected accordingly.
Additionally, electromagnetic interference (EMI) filters are required even in applications using LED drivers that provide excellent power factor correction and support TRIAC dimming.
The transient current caused by the TRIAC step will excite the natural resonance of the inductor and capacitor in the EMI filter.
The TRIAC will shut off if this resonant feature causes the input current drop below the TRIAC hold current. After a short delay, the TRIAC usually turns on again, stimulating the same resonance.
The LEDs will flash if this sequence of events occurs multiple times in a half-cycle of the input waveform. In order to solve this problem, a requirement for TRIAC dimming would be that the input capacitance is very low. This capacitance must also be decoupled from the winding impedance by the TRIAC.
According to the formula, if the capacitance in the dimming module is reduced, the resistance of the resonant circuit can be increased, which in principle suppresses oscillation and restores the desired circuit operation.