Energy saving features
1.LED light source has high luminous efficiency
The luminous efficiency of different types of light is as follows: Incandescent lights are 10-15lm; tungsten-halogen is 12-24lm/watt; fluorescents 50-90lm/watt; sodium is 90-140lm/watt. Most of the energy consumption is due to heat loss.
LED light efficiency: It emits 50-200 lumens/watt and has a narrow spectrum and good monochromaticity. 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. The power of a fluorescent lamp that has the same effect as an LED is 18 watts. .
3.LED light source has long service life
Electronic light field radiation is used to produce light in fluorescent lamps, tungsten halogen bulbs, and incandescent lamps. The filament is susceptible to heat deposition and light loss. It emits light. 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. This is a “green light 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 LED uses ultraviolet light to excite three primary color phosphors or other phosphors to produce white light mixed with multiple colors.
6.LED light source is more 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. influence, so that the current can be kept constant and the various excellent characteristics of LED can be fully utilized.
An LED constant current power supply is used to power LED lamps. The LED current is detected and controlled automatically during the operation of the power source, so there is no worry about an excessive current flow through the lamp at the time of powering on or a short circuit. 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.
Many LED manufacturers use aluminum casings for LED lamps. Aluminum casings are easy to dissipate heat, have beautiful appearance and are lightweight. Many high-end electronic products use aluminum casings. For example, the company’s high-end notebook computer series “Mac Pro” uses an all-aluminum casing to facilitate notebook computer heat dissipation, so that the computer does not even need a fan.
Aluminum shells can extend the life of the LED wick, and also make it look more beautiful. However, the aluminum lamp cup is relatively expensive and the production cost is very high. The lamp cup needs to be processed with a lathe. Some LED lights of high and medium quality will have aluminum housings.
Plastic housings are another common housing for LED lamps. 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
LEDs can be used to replace spiral light bulbs or energy-saving lights, with wattages ranging from 5-40 Watts. Some lamps are able to replace even higher-power bulbs as of 2010. A 13-watt bulb, for example, has the same brightness of a 100-watt lamp. Incandescent bulbs have an efficiency of 14-17 lumens/watt depending on the size and voltage. According to EU standards, an “energy-saving light bulb” equivalent to a 60-watt incandescent lamp requires at least Can output 806 lumens.)
Most LED bulbs are designed to be non-dimmable, but some can be operated with dimmers and have a narrow 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. Energy-saving bulbs have a life expectancy of about 8,000 to 9,000 hours. Incandescent light bulbs have a lifetime of around 1,000 hours. LED bulbs are able to be used for up to 25 years and their brightness does not decrease over time. Energy Star standards stipulate that after a lightbulb has been used for 6,000 hrs, its brightness should decrease by 10% and in the worst case, not more than 15%. LED bulbs do not contain mercury, unlike fluorescent lamps. LED bulbs also come in different color options. The higher price of LED bulbs is offset by the lower cost of electricity and maintenance.
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.). Traffic lights and holiday lighting are frequently made with single-color LEDs.
LED lights were a popular topic in 2010 for horticulture, agriculture and other related circles. NASA pioneered the use of LED lights for planting in space, and domestic and commercial indoor gardening followed suit. These planting lights have been designed to emit light waves that are identical to the wavelengths of chlorophyll. This not only promotes growth, but also reduces light waves that are not absorbed by plants, causing waste. These lights were designed to take into account both red and blue, as only these two colors are required for photosynthesis in the visible spectrum. These LED lights are more suitable for indoor growing than similar products because they can produce the same brightness, don’t require a ballast and produce less heat. A reduction in heat can help reduce evapotranspiration and thereby the number of fillings. For this reason, when using these planting lights, plants should not be overwatered.
Buying guide
- Choose LEDs with the “Three Guarantees”, and lamps that have the CCC certification mark.
- The LED lamp productlabels must be complete. Regular products should be labeled;
- Check whether the LED light power cord has the CCC safety certification mark;
- 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. A sudden increase in power supply voltage can cause LED lamps to be damaged. There are many reasons for a sudden increase in voltage, such as quality problems with the power supply or improper use by the user. Power supply voltage can suddenly increase. high.
- This is caused by a short circuit in the power supply of the lamp. It is caused by a component or short circuit in another wire that increases voltage at this location.
- 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. We all know that the lighting of the lamp is a heat dissipation process. The characteristics of LEDs will easily degrade if the temperature in the lamp is high. The LED lights can be damaged by this.
- Water is conductive and will cause the lamp to short-circuit.
- 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.
Taking the 8W offline LED driver GreenPoint(r) reference design that complies with the “Energy Star” solid-state lighting standard as an example, since the sinusoidal square wave power conversion of the flyback regulator does not provide constant energy to the primary bias, the dynamic self-power supply (DSS) ) circuit may activate and cause light to flicker.
In order to avoid this problem, it is necessary that the bias circuit be partially discharged at each half-cycle. The values of the resistors and capacitors in the bias circuit must be selected accordingly.
Even LED drivers with excellent power factor correction that support TRIAC dimming require electromagnetic interference (EMI).
The TRIAC step causes a transient current that will cause the inductor to resonate and the capacitor to resonant 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 brief delay, the TRIAC will usually turn on again and stimulate 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.