How To Choose LED bulb

 

1, LED output flux (LM number) is different, the prices is different. LED lamps shall comply with the Laser Class Ⅰ standards.
2, Antistatic ability. LED that with strong antistatic ability has a long lifetime, thus the price is high.
3, good consistency wavelength LED is with consistent color, such as requiring the same color, the price is high. Manufacturers with no LED spectral separation device are difficult to produce pure colors.
4, the leakage current LED is one-way conductive light, if there is a reverse current, it is called leakage, large leakage current LED is with short life, low prices.
5, the different luminous angle LED has a different light angle. Special light-emitting angle, the price is higher. For diffusion angle, the price is much higher.
6, the service life of LED is different, life is the key to the quality. Life is determined by the light fades. Light decay, the life is longer, price is higher.
7, Chip LED light-emitting body is a wafer, the different wafer type; there is a great difference in price. Japan, the United States chip is more expensive, generally chip prices of Taiwan is lower than that of Japan and the U.S. (CREE).
8, the size of the wafer. Wafer size is expressed by side. Quality of great LED chips is better than small chips. Chip size is proportional to the price of the same.
9, generally, ordinary LED is colloidal epoxy resin, LED light that plus a UV resistant and fire retardant are very expensive. High-quality outdoor LED lighting should be UV and fire. Each product will have a different design for different purposes. The reliability of the design aspects of LED lighting include: electrical safety, fire safety, applicable environmental safety, mechanical safety, health and safety, safe use of time and other factors. From electrical safety point of view, it should be consistent with relevant international and national standards.
From a health aspect, LED that use non-toxic materials designed product prices is much higher, especially for indoor LED lighting, you should not choose the smell of cheap LED lighting. There are only handful LED manufacturers that use non-toxic materials production. The direct ways to identify is using nose, the price for the smelly product is lower than that without smell. Professionals need a similar analysis of lead, mercury, cadmium and other toxins. From the applicable environmental safety perspective, there is a reliable dust-proof design, material fire, anti-UV, anti-low temperature cracking price of LED products is high. anty881209wong 140516

The light source characteristics of LED table light

★ Enjoy modern lighting, avoid adverse lighting effects on human health. Experts suggest that when you must use indoor lighting, lighting should be a good grasp of the five principles:
1, using a wide range of lighting, the light should be irradiated to the entire desktop;
2, the uniform illumination, illumination of each part must be consistent;
3, stable lighting, light not too bright or flashing;
4, to maintain adequate lighting;
5 Finally, be careful not light direct to the eye.

★when use illuminated light, you should have a healthy common sense: For example, the best read illumination has a great relationship with age, illumination that elderly need is 15 times than that for the child.

★ Eye high-frequency electromagnetic radiation:
To overcome the flicker 50 Hz fluorescent lights that use 40,000 ~ 55,000 Hz frequency, the high frequency eye protect LED table light is inevitably will bring the power of high frequency electromagnetic radiation. Environmental experts point out that excessive electromagnetic radiation can cause heart palpitations, insomnia, leukopenia, memory loss, and even cause immune function, cardiovascular system, and nervous system damage.
Electromagnetic radiation damage is cumulative, the closer, the lighter weight, the greater the damage subject is. A little more protection, curbing the risk has become a consensus.


★ LED lighting is a green light: low voltage, low power consumption; stable performance, long life (typically 100,000 hours); strong anti-shock and anti-vibration; LED lighting products can provide high-quality light environment, improve efficiency lighting systems, there is no infrared and ultraviolet components, high color and has a strong directional light; good dimming performance, no visual error when the color temperature changes; cold light source, low heat, safe to touch; improve glare, reduce and eliminate light pollution. There are zero flicker, does not make eye fatigue phenomenon. No electromagnetic radiation, to prevent radioactive contamination to protect the brain. It can provide a comfortable space for illumination, but also meet people's physical health needs, which is environmentally healthy light. For a long-term use, it can protect eyesight and prevent myopia.
Disadvantages:
1, expensive.
2, there is a great gap between the theoretical optical efficiency and actual photosynthetic efficiency.
3, there is a big gap between the theory use life (10w hours) and actually life.
4, there are still some heat.
5, the light fades can be greatly reduced. anty881209wong 140509

The selection of power supply and demand of LED Table lamp

There are many LED drive ways, for the lamp products, we use low-voltage constant current driver. Constant current drive mode is an ideal LED drive mode; it can avoid the current changing that caused by the LED forward voltage changes, while a constant current can ensure the LED brightness stability. Light sources that commonly used AC-driven is with stroboscopic effect which would make the visual nerve fatigue because of the changing stimulation intensity, while constant current LED driver can offer a steady light, completely with no flicker, the visual feel very comfortable. Lamp is a safe low voltage input, to avoid the ordinary lamps due to electrical fault caused by accidents.

Lamps high-performance optical system
Lamps have excellent high-performance optical systems, and high-performance optical reflector is one of the most technical content of components. It has a high reflectance, good uniformity and control the angle of the light reflected light. We designed lighting optical system through computer simulation; make the light emitted from the LED can be re-allocated by the optical apparatus such as a lens and a reflector with reasonable fully to meet the design requirements. Anodized reflector is with high reflection efficiency, durability; Use the light materials that mixed with high transmittance to make the light shade can maintains high efficiency optical system, but also reduces glare.

When purchasing the LED lamps lighting equipment that will be used as learning light, we should pay particular attention to the problem of glare lighting, do not let the light straight-line projection of the eye. Because when the light is projected directly in the eyes, the eyes will photophobia feeling tired easily, and restlessness and feeling around the dark, leading to clear line of sight. In this long-glare lighting environments reading, writing, and vision will be greatly damaged. Eye health, quality of lighting should first start, which requires us to pay attention to luminous quality when buying lamp. anty881209wong 140504

Applied range of LED string light

With the rapid development of social economy, LED as a powerful tool for advertising and decorative landscaping, has been used more common, which has become a corporate identity promotion and beautify the city indispensable beautiful scenery line.

With the increasing industry products, services competition, how to build a unique publicity image for their corporate image, products, logos to attract the attention of consumers, brand marketing strategy has become a top priority of the work. "Outdoor identification system”, and print, these various image propaganda forms is increasingly which reflects its irreplaceable role. LED light string as high-tech products, which can be widely used on the following fields:

• architecture, landscape, environment, bridges, stadiums and airports, municipal lighting;
• Schools, hospitals, old buildings, churches, and the company's architectural lighting;
• exhibitions, concerts and fashion show event lighting;
• hotels, resorts, restaurants, cruise ships and lighting spa;
• mall, store design, displays and other retail lighting;
• Ground, water features, fountains, swimming pools and spas landscape lighting;
• theater, television studios, film sets, dance and photography stage lighting;
• exhibitions, planetarium, zoo, aquarium and museum exhibit and teaching of lighting;
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LED string lights can be used effectively to enhance any dull spaces or corners. They come in various shapes and sizes and can be made to suit the theme of your party to a great effect. Festivals and occasions have their own favorites and a huge variety to choose from. In fact they will leave you spoilt for choice. The best thing about LED string light is that they are cool to touch. They also provide simpler maneuverability and flexibility. All this make them easier to handle than other lighting options which get heated up fast.

Battery of LED flashlight

There are commonly use flashlight batteries, 1AA (a 5 batteries), 2AA (2 AA batteries), 3AA (3 AA batteries), NO.5 batteries are also divided into alkaline batteries which is often said that the battery cannot be charged (4.5V) and rechargeable NiMH batteries (1.2V).

There is the lithium battery; the voltage is 2.45-4.20V. There are various models, 14500, 16340, 18650 and so on. Many friends feel somewhat dizzy when look at these figures, say how to distinguish? In fact, it is very simple. The model numbers are given for a reason, such as 14500 battery is 14 mm diameter and length 50 mm; 16340 cell diameter is 16 mm, length 34 mm, and so that a 18650 diameter is 18 mm, length 65 mm.

Lithium battery also divided into protection circuit (to prevent overcharge and over discharge circuit) and without, we should all know lithium should not overcharge and over discharge, if the battery is fully charged and still do not get the charger for a long time continue, charge leakage or explosion would occur;

Over discharge is the battery power is totally gone before going to charge, which will cause the battery scrap. that installed a protection circuit will not have this problem, but the drawback is that the volume gets bigger which is bigger than that without protection, increasing about one millimeter circuit (that is to say the upper battery size) in diameter length about 2 mm. Some flashlight makes it somewhat difficult to put the battery which needs to go into slowly groping, but most are easy to put a flashlight to go.

There is the problem of series and parallel, here to talk about the fact we had junior high school physics: the series current is constant while the voltage is 2 times than before; parallel voltage is constant while current is 2 times than before. If your battery is with protection circuit (with anti-overcharge and over discharge function), do not look at the following introduction, the following is mainly for lithium battery protection circuit does not explain: the new battery is not too much;  anty881209wong 140418

When use the battery for the first time, do not charge for too long time, take action according to the charger's instructions. During charging, according to the charge speed, when the color change indicator immediately remove the battery, Do not overcharge, recommended charging time should not exceed 3-5 hours; fully charged, the battery should be removed from the charger;

Several points of purchasing LED light

Be careful of cheap trap. There is a large price difference between different LED light sources. LED with the same brightness and colors, the price can differ several times. This gap is mainly reflected in the reliability and lumen of LED, appearance and other properties of the above process. Low price LED chip size is small, the electrode is rough, material used (phosphor and glue) is poor. Resistance to electric current, temperature and humidity changes is poor, the light fades is fast, life is short, so the blind pursuit of low-cost may outweigh the benefits.

A clear understanding of the relevant standards, from a security point of view, the product should comply with the relevant international and national standards. Because LED is a new tech product, China lags behind national standards, only provide product qualification testing. So international safety certification (such as GS, CE, UL, etc.) is the measure of the quality of LED lights standard, while there are not many manufacturers have both country and international safety certification and product quality certification. When purchasing, you need to carefully identify the authenticity of the certificate. LED with International safety certification of products, prices are generally higher.

Select the constant current power supply LED lights. The price of LED drive power resistors, capacitors, IC and other components differ very big. The entire power supply used in the design of programs and the reasonableness of the line itself will directly affect the quality of the product. Some drive power is just constant voltage, failed to get constant current, and LED lamps must be constant in order to make ensure the quality and service life. So, when you purchase, this requires extra attention, especially for high-power LED lights.  anty881209wong 140404

Theory of LED light

Light-emitting diodes can be divided into ordinary monochromatic light-emitting diode, high-brightness light-emitting diodes, and ultra-high brightness light-emitting, color light emitting diode, light emitting diode flashes, voltage-controlled light-emitting diodes, infrared light-emitting diode and negative resistance light emitting diode.

There are two LED control mode: constant current and constant voltage. There is a variety of dimming, such as analog dimming and PWM dimming. Most have adopted the LED constant current control, so you can maintain a stable LED current, less susceptible to VF changes; you can prolong the service life of LED light.

With the lighting market matures, the style of lights is more and more gorgeous. Consumers are often guided by the market when selecting the lights, becoming slick, even after some lights are installed, which do not be turn on for a few times a year, for example, the reading lamp rarely needed to be turn in living room, and the lamp is placed next to sofa in the living room, which only plays a decorative role. Though the Crystal Light is beautiful, but after a long time, the dirt falling on the crystal not only affects the appearance, but also affect the refraction of light effects, it should be carefully chosen. 

LED's were mostly used in electronic equipment displays and on outdoor signs, and this has since then changed significantly. Modern LED lights have become more affordable than they used to be, and they are more energy-efficient as well. They come with a bright, white light output, a very long lifespan, and, last but not least, with a budget-friendly price tag.  anty881209wong 140328

Low power consumption, long service life, environment friendly and widely utilization are the attractive point that make LED light so popular among house owners. If you have a new house to decorate, do not miss the LED light.