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When people go to the supermarket to buy a light bulb, the incandescent lamp, energy-saving lamps, LED lamps, in the end what kind of lamp lighting effect is good?

Experiment: incandescent lamp

I bought three of the common lamps on the market to carry out a contrast experiment. These three lamps are incandescent, energy-saving lamps and LED lamps, the price from 3 yuan to 49.8 yuan range. The incandescent lamp power rating of 40 Watt, energy-saving lamp nominal power for 8 W, its nominal equivalent to 40 watt incandescent lamp brightness, and the rated power of the LED lamp for 5 watts, the nominal brightness is quite to the 40 watt incandescent lamp in a dark room, the the three lamp are respectively connected to the base of 220 volts, current meter to measure current, with the real power of the measurement of light through the test current and soon obtained the real power of the three lights. Incandescent lamp current of about 40, the measured power of about 0.18 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 lamp measured power is the highest, but also the most power LED lights

So, the actual lighting of the three kinds of lights and how? Experiments show that although the nominal power of the LED lamp is only 5 watts, its brightness is the highest. Incandescent lamp brightness is slightly lower, the distribution of yellow light looks very bright, but the feeling is relatively soft. Energy-saving lamp tube shape to shape, the light-emitting area larger, but the color is white, look a little harsh conclusion: LED lamp price highest.

Single from the price point of view, to buy a LED lamp is equivalent to the purchase of 16 incandescent; to buy a energy-saving lamps, it is equivalent to the price of 9 incandescent lamps. Buy LED lights are clearly not as good as energy-saving lamps and incandescent light. But the power consumption and the lamp's service life and other factors, the LED lamp lighting for 15000 hours, equivalent to 15 incandescent or 3 energy-saving lamps and. In the power consumption and incandescent lamps need to consume 600 kwh of electricity, energy-saving lamps to 115.5 degrees, and LED lights is only 69 degrees calculated according to 0.48 yuan per kWh of electricity, with 15000 hours, the incandescent lamp is used to generate electricity for 333 yuan, energy-saving lamps for $139.44, and LED lights only for $82.92. If long-term use, or LED light bulbs the most cost-effective, and the best lighting effect.