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advantage
(1) Energy saving. The electronic ballast of the fluorescent lamp is used to supply the lamp with a frequency of 20 to 60 kHz, so that the luminous efficiency of the lamp is increased by about 10% than that of the power frequency (by a length of 4 feet), and the power consumption is low, so that the total of the lamp The input power is reduced by about 20%, which has better energy saving effect.
(2) The stroboscopic light is eliminated, and the illuminating is more stable. It is beneficial to improve visual resolution and improve efficacy; reduce visual fatigue in continuous operation and help to protect eyesight.
(3) The starting point is more reliable. After starting the lamp, the starting point is successful and avoids multiple starting points.
(4) High power factor. Fluorescent lamps above 25W that meet national standards have a power factor higher than 0.95. However, it should be noted that the national standard has high harmonic limits for lamps below 25W, so that its power factor drops to 0.7~0.8.
(5) Stable input power and output luminous flux: High-quality products have good voltage regulation performance. When the power supply and voltage deviation are large, the light source can maintain constant power and stabilize the illumination, which is conducive to energy saving.
(6) Extend the life of the lamp. The constant power of the high-quality products and the decrease in the lamp current, as well as the reliability of the starting point, can extend the life of the lamp.
(7) Low noise. High-quality electronic ballasts can reach noises below 35db, and people can't feel the noise.
(8) It can be dimmed. For places that need to be dimmed, such as the original dimming lamp or tungsten halogen lamp dimming, replaced by high-efficiency fluorescent lamp with dimmable electronic ballast, can achieve a wide range of dimming from 2% to 100%.
Disadvantage
(1) Pay attention to harmonic content. The newly revised "Performance Requirements for AC Electronic Ballasts for Tubular Fluorescent Lamps" (GB/T15144-2005) has eliminated the polarization (L-class and H-class) of electronic ballasts specified in the original standard, and their harmonic limits. Should comply with the "electromagnetic compatibility limit harmonic current emission limit" (GB17625 · 1-2003). The standard Class C - Harmonic Current Limits for Lighting Equipment are shown in Table 2.
Users should pay attention to the harmonic limit of the lamps below 25W in Table 2, which is very loose. For example, if a small amount of fluorescent lamps (including T8, T5 tubes and compact fluorescent lamps with a length of 2 feet) are used in a building, Causes severe waveform distortion, excessive neutral current, and poor power factor degradation.
(2) Focus on product quality and level. There are many electronic ballasts on the market, the quality and level are very different, which can be described as mixed. The main performance is:
1 large harmonic content;
2 low lumen coefficient;
3 reliability is not high;
4 short service life.
Although these products are inexpensive, they must be taken care of, and it is recommended not to use them.
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