Investigation + experimental home lighting or LED lamp cost-effective

Recently, the public Liu to the supermarket to buy light bulbs, bulb shelves can let him pick hualiaoyan a superb collection of beautiful things. "In addition to the traditional incandescent lamps and energy-saving lamps, there is a kind of LED lights, I do not know how this kind of lamp lighting effect? "Through the experiment, we take a look at these bulbs which is the most cost-effective.

investigation

LED lamp is 16 times more expensive than incandescent lamp

At present, incandescent lamps are facing the situation is gradually eliminated, energy-saving lamps become mainstream in the market. The reporter saw in Puhuangyu a large supermarket, energy-saving lamp has become the flagship product, the new LED lights rise is not difficult to buy, while the incandescent lamp has been hard to find. From the point of view of shape, with the energy-saving lamp tube shape is different, LED lamp is also a spherical bulb, similar to incandescent lamp. However, the external packaging of the display, LED lamp power is much lower than the ordinary incandescent lamp.

"The light bulb in your hand is a power of 5 watts, which is equivalent to an incandescent lamp of 40 watts. Supermarket shopping guide told reporters that the selection of LED lamps and energy-saving lamps are mainly to see the brightness of the label on the packaging and the corresponding number of incandescent lamps. Reporters also noted another 3 LED mark of the lamp, the brightness of its equivalent to 25 watt incandescent lamp.

Shopping guide told reporters, and now many people still choose incandescent or energy-saving lamps, customers do not buy LED bulbs. "LED light is too expensive. Reporters noted that a brand of 5 Watt LED lamp price of $49.8, more expensive than other energy-saving lamps or incandescent to several times, called the light bulb". Through parity software inquiries, the lowest price of this LED light is also more than 40 yuan. But it is worth mentioning that the LED lamp life of up to 15 years.

Experiment

Incandescent lamp power consumption

So, what are the actual results of the use of these common bulbs on the market? Reporters bought 3 common light bulbs on the market were compared.

Reporters purchased these 3 bulbs are incandescent, energy-saving lamps and LED lights, the price ranging from 3 yuan to 49.8 yuan. The incandescent lamp rated power of 40 watts, energy saving lamp rated power of 8 watts, its nominal equivalent to the brightness of the incandescent lamp of 40 watts, while the rated power of LED lamp is 5 watts, its nominal brightness is equivalent to the incandescent lamp of 40 watts.

In a dark room, the reporter will be the three light bulbs are respectively connected to the lamp voltage of 220 volts on the measured current with the current meter, to measure the actual power bulb; at the same time, the three lamp box placed at a distance of 30 cm with a camera light bulb, reflective case packing box with a fixed amount of exposure thus, intuitively feel the difference between the three light bulbs.

By measuring the electric current, the actual power of the three kinds of bulbs was obtained. Incandescent lamp current is about 0.18, the measured power of about 40 watts; energy saving lamp current is about 0.035, the measured power of about 7.7 watts; LED lamp is about 0.021, the measured power of about 4.6 watts. From these data, the incandescent power is the highest, the most power consumption.

LED light is the brightest and most cold"

So, what are the actual lighting effects of the three bulbs? Reporters with 200 sensitivity, aperture of 5.6, 1/30 shutter exposure combination shot a group of photos, recording the different light bulb under the irradiation of the packaging box. Photo shows, although only 5 Watt LED lamp nominal power, its brightness is the highest. The brightness of the incandescent lamp is slightly lower, and the yellow light is very bright, but the feeling is relatively soft. Energy-saving lamp lamp is in the shape of back shape, light emitting area is larger, but the color is white, look a little harsh.

With 40 watts or equivalent to 40 watts, why the lighting effect is different? It turned out that the incandescent lamp and energy-saving lamps are scattered around, and the LED light is emitted in a single direction, so it is lighter than the other two models.

In the heat, the use of incandescent bulbs in 2 minutes due to high temperature not directly by hand touch, energy-saving lamp is clearly but hold the lamp fever, and does not feel hot, while the LED bulb is very little, only in the light bulb near the mouth, touch can feel warm.

conclusion

LED lamp cost is highest

From the price point of view, to buy a LED lamp, which is equivalent to the purchase of 16 incandescent lamps, the purchase of an energy-saving lamp, which is equivalent to the cost of the price of 9 incandescent lamps. Buy LED light is obviously not as good as energy-saving lamps and incandescent lamps. However, the calculation of power consumption and lamp life and other factors, to LED lamp lighting life of 15000 hours, equivalent to a total of 15 incandescent lamps or the sum of the 3 energy-saving lamps. In terms of power consumption, incandescent need to consume 600 kwh of electricity, energy saving lamp is 115.5 degrees, while the LED lamp is only about 69 degrees.

In accordance with the calculation of 0.48 yuan per kilowatt hour, the use of 15000 hours, the use of incandescent electricity generated by the cost of $333, energy saving lamp is $139.44, while the LED lamp is only $82.92. If used for a long time, LED lamp is the most cost-effective, and the best lighting effect.

Because of the large consumption of incandescent lamp, it can not meet the requirements of energy saving and emission reduction and building a conservation minded society. Countries around the world, including China, will phase out incandescent light bulbs. According to reports, since January 1st this year, South Korea has been a complete cessation of incandescent lamp production and imports, to popularize LED lamp, LED lamp screw energy-saving alternative products. From the energy-saving emission reduction, building a green Beijing on the consideration, we also recommend that you use more energy-efficient LED lights.