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Monday, December 6th, 2010

What Are The Advantages Of LED?

LED is short for Light Emitting Diode, a semiconductor that can transform power into visible light. With the development of the economy today, power is becoming more and more expensive and just for this reason, LED becomes the most useful replacement. LED lights are used in different situations, such as decorations of billboards and buildings and emergency lights in homes. As a matter of fact, when people hold a party in festivals they can use such kind of ghts to replace high power-consumption lamps, especially in Christmas day.

And what are the advantages of LED? The following points contain the main advantages of it.

1. Long life. One LED light just need 1 kilowatt hour afer using for a long time. There are no filaments in alight bulbs and no glass bulbs so that LED lights are shockproof and hard to be broken.

2. High-efficiency and energy saving. Balance duration: 50000 hours. It consumes just several kilowatts after you use it 1000 thousand hours. A 60-watt incandescent lamp comsumes one watt after 17 hours consumption.

3. Healthy light. The light is healthy because it contains no ultraviolet rays and infrared rays, which are contained in ordinary lamps.

4. Green and environmental protection. LED doesn’t contain harmful elements like mercury and xenon. It is easy to recover these lights and the most important is that electromagnetic interference can not be produced.

5. Vision protection. No strobe light because it is propeled by direct current. And ordinary lamps always shoot strobe.

6. High minescence efficiency and low heat consumption. 90 percents of the electric energy can be converted into light energy. Ordinary lamps just convert 20 percents of electric energy into light energy because most of them will be converted into heat energy.

7. High safety factor. It will nor provide too much heat so that it is safe enough no matter in the house, in the open country or even in a mining field. What’s more, children will be safer when ues LED lights in family paties. Parents can set their minds at ease an enjoy the parties happily.

8. Huge market potential. You can ues it in many situations, what I mean is in your house, decorating trees and buildings in the evening, lighting if the electricity fails or even when you escape from somewhere in an emergency, you can use it to help to run away.

In short, there are a lot of advantages for people to ues LED lights. Christmas is coming and many families will get ready to hold parties. The best choice for you is to replace incandescent lamps with this useful lights. You will find it has excellent quality and reasonible price. So, why do you still waiting? Go and buy one quickly.

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Wednesday, December 1st, 2010

Some Tips on Choosing a DV Camcorder

With the rapid development of DV camcorder market, manufacturers continually launch new products with powerful functions. Facing various DV camcorders and all kinds of technical parameters, consumers inevitably feel confused. Different DV camcorders have different advantages. Consumers have to choose it according to personal needs. Here’re some tips on how to choose a desirable DV camcorder.

a

Price

The reason why put price at the first place is that everyone has his or her psychological endurance price when choosing a DV camcorder. You should avoid chasing for high price blindly. High price must have some improved functions. But the point is if the new functions suit for you. For example, SONY TRV18E is 750 more expensive than TRV16E. Their difference is that the former has a better shooting ability. You can definitely save your money without affecting the functions you want.

CCD

CCD is an important factor of a DV camcorder. Basically, the pixels of CCD decide its grade. Pixels directly decide the clarity, color, and fluency of your photos. 3CCD is better than single CCD, because it won’t cause color cast. 3CCD has better functions in shake reduction and minimum illumination. Just like other factors, the image quality of small CCD is relatively vague and the richness of color is poor.

b

Lens

Lens is a determinant of image quality. The greater optical zoom ratio, the scene size can be greater, which is very convenient for the composition when shooting. Lens aperture has to be large. If the lens aperture is small, photos can’t have a good effect when it shoots in a situation of dark light.

Appearance and volume

Generally, DV camcorder is with entertainment property. So it’s very important to consider about its appearance. And a small and cute DV camcorder is convenient to carry out. It can be used any position to shoot easily with a small volume.

c

LCD

It has to have high brightness, large pixel and large volume. 2. 5 inches and 3. 5 inches are popular now. LCD can display a larger image and it is easy to see the images you want to shoot and play back the recorded images.

Accessories

Don’t look down the accessories which have an important effect in DV camcorder’s normal running, such as battery, memory card, various wires, UV mirror and tripod.

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