Recently, LED fluorescent lamps have become one of the earliest indoor LED lamps because they have many advantages over fluorescent lamps.
One. Advantages
Compared to fluorescent lamps, LED fluorescent lamps have 10 major advantages:
1. High luminous efficiency:
The luminous efficiency of fluorescent lamps is about 55-80 lm/W (Philips T8 fluorescent lamps have a luminous efficiency of 72 lm/W), while the luminous efficiency of LEDs is above 100 lm/W. Recently, the luminous efficiency of Cree's XLampXP-G has reached 130 lumens / W, and will continue to improve in the future. The difference between the two is now nearly doubled, and it is likely to reach more than three times in the future.
2. High efficiency of lamps:
The efficiency of a luminaire mainly refers to effective light efficiency, because a fluorescent lamp emits light 360 degrees, and light emitted in the opposite direction is of no use. Therefore, fluorescent lamps usually use a white lampshade to reflect a considerable portion of the reverse light. In general, fluorescent lamps have an efficiency of only about 70%. The LED fluorescent lamp is 120 degrees, so all the light is effective light. Although sometimes the 120 degree illumination angle is narrower, it is still sufficient in most cases. And this angle of illumination can also be adjusted as needed.
3. LED light effect is high
As mentioned earlier, the luminous efficiency of Philips' T8 fluorescent lamp is 72lm/W, and the 36W fluorescent lamp emits 2592 lumens, but the luminous efficiency is only 70%, so the effective lumens are 1814.4 lumens, and the luminous efficiency of LED has exceeded 130lm/W. Assuming 100 lm/W, as long as 18W, it can reach 1800 lumens, that is, as long as half the power of the fluorescent lamp can have the same brightness. Moreover, the luminous efficiency of LEDs is increasing year by year.
4. Power efficiency is high
Because all luminaires require a dedicated power supply in addition to incandescent lamps, the efficiency of the power supply affects the efficiency of the entire luminaire.
Take Philips' 36WT8 fluorescent lamp as an example. Its rated output power is 36W, but due to the access of the magnetic ballast, the measured input power is 42.4W, that is, the core inductance loss is 6.4W, the efficiency is reduced to 85%, most domestic iron core inductor power consumption Above 10W, the power factor is below 0.512. The power efficiency of LEDs is usually as high as 90%, and an 18W LED fluorescent lamp requires only 20W of input power. The power factor can also reach 0.9 or more.
It saves more than half of the electricity compared to fluorescent lamps, which means that an 18-watt LED fluorescent lamp can replace a 36-watt fluorescent lamp.
Not only that, LED fluorescent lamps have many other advantages:
5. Long life:
A carefully designed LED fluorescent lamp can last up to 50,000 hours. The life of a fluorescent lamp is usually only 5,000 hours (some domestic fluorescent lamps have a lifetime of only 300 hours). The difference between the two is nearly 10 times. The best long-life fluorescent lamps are also only 10,000 hours, and the difference between the two is also five times.
6. Contains no mercury and no pollution.
We know that fluorescent lamps contain mercury. The 36mm fluorescent lamp contains 25-45mg of mercury, and the 26mm (T8) contains 20mg of mercury. Fluorescent lamps are made of fragile glass. Once the glass is broken, the mercury will immediately evaporate into the air, instantly bringing the concentration of mercury in the surrounding air to 10-20 mg/m3, exceeding the national regulations. 1000-2000 times. Mercury is a toxic substance that is very harmful to the human body. When the mercury vapor reaches 0.04 to 3 mg, it will cause chronic poisoning within 2 to 3 months. When it reaches 1.2 to 8.5 mg, it will induce acute mercury poisoning. A milligram will directly cause the animal to die. And 1mg of mercury is enough to contaminate 5454.5 kilograms of drinking water, so that it does not meet drinking standards. The LED fluorescent lamp does not contain any toxic substances, and it is a completely green and environmentally friendly non-polluting light source.
7. Wide range of color temperature
It can provide almost any color temperature, and it can also provide red, green and blue light in any color.
8. The color rendering index is high, the color rendering index of incandescent lamps is 95, the fluorescent lamps are 65-80, and the LED fluorescent lamps can be >80. No UV radiation.
9. Non-glass products, not easy to break, impact resistance, vibration resistance.
10. The LED fluorescent lamp with external isolated power supply can not reach the high voltage of the mains at both ends of the lamp. Only the DC safety voltage below 36V, there is no danger of electric shock, it is a safe lamp.