2013年9月28日星期六
2013年9月24日星期二
the comparison between Traditional fluorescent and LED lamp
The LED fluorescent lamp (18W) and traditional 36 watt fluorescent illumination on the comparison, using a light meter to measure the different findings:
1 LED fluorescent visually obvious than traditional fluorescent light, but light meter display illumination than traditional fluorescent LED fluorescent high;
2. With increasing distance measurements, the traditional attenuation under fluorescent illumination than LED lamp illumination attenuation. For example ,in the 1 meter position the LED illumination is 10, the traditional fluorescent lamp of 15, to 2 m, the LED is 7, the traditional fluorescent lamp is 14,3 m is the LED is 5, the traditional fluorescent lamp is 12.
On the first question, the majority in the online search is the explanation be attributed to the spectrum than traditional fluorescent LED tube, LED fluorescent eyes but sensitive than traditional fluorescent light wavelength region. But this is only a theoretical basis, I do not know whether there is any experimental method to prove.
Generally speaking, LED's beam angle to be small, mainly concentrated in the beam angle light inside, so look directly at the lamp feel than fluorescent light. Beam angle is also the problem increases with distance, the beam angle is relatively small, the ratio of illuminance decrease also large.
LED tube light beam angle is small, the same luminous flux of the LED tube lamps and fluorescent lamps at 20 meters below the room lighting, the overall feeling is still brighter fluorescent lamps. A fluorescent glow is four weeks, there are ceilings, walls reflective, the whole room feel "well lit", while the LED tube lights will shine beneath a region of relatively bright, high around roofs and darker.
1 LED fluorescent visually obvious than traditional fluorescent light, but light meter display illumination than traditional fluorescent LED fluorescent high;
2. With increasing distance measurements, the traditional attenuation under fluorescent illumination than LED lamp illumination attenuation. For example ,in the 1 meter position the LED illumination is 10, the traditional fluorescent lamp of 15, to 2 m, the LED is 7, the traditional fluorescent lamp is 14,3 m is the LED is 5, the traditional fluorescent lamp is 12.
On the first question, the majority in the online search is the explanation be attributed to the spectrum than traditional fluorescent LED tube, LED fluorescent eyes but sensitive than traditional fluorescent light wavelength region. But this is only a theoretical basis, I do not know whether there is any experimental method to prove.
Generally speaking, LED's beam angle to be small, mainly concentrated in the beam angle light inside, so look directly at the lamp feel than fluorescent light. Beam angle is also the problem increases with distance, the beam angle is relatively small, the ratio of illuminance decrease also large.
LED tube light beam angle is small, the same luminous flux of the LED tube lamps and fluorescent lamps at 20 meters below the room lighting, the overall feeling is still brighter fluorescent lamps. A fluorescent glow is four weeks, there are ceilings, walls reflective, the whole room feel "well lit", while the LED tube lights will shine beneath a region of relatively bright, high around roofs and darker.
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