On the evening of October 21, 1879, Edison and his assistants invented the electric light by loading the carbon filament into the light bulb.
On November 4, 2011, the National Development and Reform Commission and other departments announced the phase-out of incandescent lamps according to the power level. This ancient lamp will gradually emerge from people's field of vision.
Rising star beyond incandescent lamps: fluorescent lights and LED energy-saving lamps
Humans have used incandescent lamps for more than a century, but such lamps can only convert 10% of energy into light, and 90% convert it into useless heat.
When working with incandescent lamps, the temperature of the glass bulb can reach up to about 100 °C. This kind of inefficiency consumes a lot of energy. On November 4th, the National Development and Reform Commission and other departments announced the phase-out of the incandescent lamp roadmap according to the power. It decided to ban the import and sale of more than 100 watts of ordinary lighting incandescent lamps from October 1, 2012. .
Liu Changxin, an engineer at Shenyang Huaguang Lighting Appliance Co., Ltd., said that the reason for eliminating incandescent lamps is because there are more energy-efficient lamps.
"Fluorescent lamp is the second generation of light source after incandescent lamp. It uses gas to discharge. When the gas inside is energized, it will emit light. The efficiency is much higher than that of incandescent lamp. The efficiency is close to 40%. The heat generated is just the same brightness of incandescent lamp. One-sixth. So in many places, especially in summer shopping malls, there is neither too much heat and electricity."
In the inspection room, there is a metal base, half of the bulb is covered with metal and the other half is a milky white shade.
Liu Changxin said: "This is a led energy-saving lamp, which is the most advanced light source at present. When current is applied to the wafer through a wire, the electron will emit energy in the form of photons, which is the principle of LED illumination. In theory The efficiency of LED energy-saving lamps can reach 100%, but with the current process, the efficiency of converting electrical energy into light energy is above 45%."
The same 40-watt LED energy-saving lighting flux is about 5 times that of incandescent lamps
In Shenyang Huaguang Lighting Appliance Co., Ltd., Liu Changxin tested and compared incandescent lamps, fluorescent lamps and LED energy-saving lamps according to the comparison plan.
The equipment tested consisted of three parts, an integrating sphere with a diameter of two meters, a sensor and a computerized spectral analysis system.
Turn the integrating sphere on, place the light in the goal, and turn off the integrating sphere after power-on. There is a white barium sulfate coating on the inner wall of the integrating sphere, which can reflect the light to the sensor in a closed space. The sensor is connected with the computer spectrum analysis system to systematically analyze various indicators of the light source.
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