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