How is the United States energy-saving lighting?

All of us can electricity is about 1/4 for lighting, the electric energy value of about $37 billion. That is more than America and Africa for various purposes of power sum. Lighting is one of the most important aspects in the use of electrical energy. Most of the light is actually a heating tool. Even the most efficient fluorescent lamp can only use 20% of its energy into light energy, and the other 80% are converted into heat. Incandescent lamps are still used in most homes, and the efficiency is only 1/3 or 1/4 of that of fluorescent lamps. Only 6% of the electricity used in incandescent lamps is converted into light, and the rest is converted into heat radiation. Many large office buildings by the heat generated by the lighting system enough to make the building no longer need other heating equipment; some office buildings because of the excessive amount of light, and even winter to open air conditioning refrigeration. In the use of air-conditioned buildings, each additional two watts of unnecessary lighting electricity, you need to use more than one watt cooling. It is important that the lighting should be functional, that is to say, to achieve the purpose to be achieved, without exceeding the demand. The public service commission of New York former chairman Joseph Swidler said outside his office corridor lighting ", do it or act as a go-between for counterfeit money are more than sufficient moment", but it is just for people from one office to another office light. On the market there are many lamps available, including standard incandescent lamp, fluorescent lamp, compressed tubular fluorescent lamp, tungsten halogen lamp, metal halide lamp, mercury vapor lamp, high-pressure sodium lamp and low-pressure sodium lamp etc.. All of these lights, and other types of lamps, have their own applications and functions. The first 4 are especially suitable for home use. Standard incandescent lamp in 1879, Edison was the first successful invention of incandescent lamps. The modern incandescent lamp is an electric current through a small circle of tungsten, tungsten and shiny make heating. Incandescent lighting is the most successful product in the field of lighting. Currently dominates in almost all domestic lighting applications. However, because incandescent lamp can only about 1/20 of the energy into light energy, its efficiency is very low. Incandescent lamp high wattage incandescent lamp efficiency is higher than that of low wattage. Of course, if the 50 Watt light bulb is enough, do not use a 100 watt. The life of an incandescent lamp is the shortest of all common bulbs. Some manufacturers claim to produce a super life incandescent lamp, in fact, only the filament is thicker, not easy to burn it. The bulbs are much less efficient than standard incandescent bulbs and have no help in tackling global warming. The most suitable for incandescent lighting or not often use a very short time, such as guest room, boiler room or for safety will be temporarily opened near the stairs. For long-term lighting, the use of more efficient bulbs can be cost-effective and can reduce CO2 emissions. Compressed fluorescent lamps most hotels use compressed fluorescent lamps. Hotels usually pay attention to the cost of lighting. Of course, they will not let the guest book also does not look into. It's the answer: a 25 Watt fluorescent light is as bright as a 100 watt incandescent lamp. The Marriott Hotel Group has saved millions of dollars in electricity bills for the bulbs. The life of a fluorescent lamp is 10 times as much as that of a standard incandescent lamp, and the energy required to produce the same brightness is only about 10% of that of an incandescent lamp. "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" ". Now the fluorescent lamp is no longer not bulky guy general Amgen lampholders, they have various shapes, circular and annular - short pipe, spiral, and most with the lamp holder. Although the first time the purchase of compressed fluorescent lamps than incandescent high prices, but in the long run, the cost of incandescent lamps than two times more expensive than fluorescent lamps. This account is very simple. For example, you spend $20 to buy a quality of the best compression fluorescent lamp (which is the full retail price, in the store can be about half the cost). A standard incandescent lamp with the same brightness of 100 degrees is $0.5, with a life expectancy of up to 1000 hours. To achieve 10 thousand hours of lighting, need to use these 10 incandescent bulbs, spend $5. It seems to be much cheaper than using a compact fluorescent lamp, but you have not yet been charged with energy. The average price is 8.4 cents per kilowatt hour. Let the 100 watt incandescent light up to $10 thousand an hour is $84. Plus $5 for the 10 bulbs, the total cost is $89. The 25 Watt compressed fluorescent lighting for the next 10 thousand hours of electricity plus $20 purchase costs, a total of $41. The cost of an incandescent lamp is two times that of a fluorescent lamp. Early compression fluorescent lamps with magnetic ballasts, and sometimes cause the lights flicker uncertain, but the new fluorescent lamp has completely solved the problem. All the light from the fluorescent lamp is blue, and some people think it is cold and harsh. But now the phosphorus treatment, the light can be converted into warm colors. It is estimated that there are about 3 bulbs per household in the United States for more than 5 hours a day, if each of these bulbs are replaced by compressed fluorescent lamp, CO2 emissions per day can be achieved by 24 million tons. If each household will replace only the most commonly used bulbs into compressed fluorescent lamps, the United States can reduce electricity consumption by 32 billion kwh per year. Green lighting is a voluntary project sponsored by the national environmental protection agency. It encourages companies to sign an agreement for low cost and high efficiency of light fixtures. Participants can significantly reduce the cost of lighting while maintaining lighting quality. The annual rate of return on investment for this purpose is as high as 30%. If all non home lighting in the United States is in line with green