Which light source is better for reading?

2020-10-25

1. Incandescent lamps, tungsten halogen lamps (note that there is also a metal halide lamp, with different principles and gaps in color rendering), low-quality energy-saving lamps, and low-quality LEDs. The strobe is more obvious (keyword: strobe depth). This information is basically not available on the Internet. If you are interested, you can watch the measurement results of EERE and other institutions. You can also use the photosensitive element to connect to the oscilloscope. If you save the point, use the mobile phone camera very close (within a few centimeters to bypass the mobile phone). Anti-stroboscopic algorithm of the camera) look. In addition, the stroboscopic frequency of incandescent lamps, halogen lamps, and energy-saving lamps is not 50Hz, but 100Hz. Energy-saving lamps with high frequency tens of thousands of flashes per second are actually 100Hz. The brainless propaganda in the market has confused the operating frequency of the switching power supply with the frequency of the output ripple.

2. The color rendering of incandescent lamps and tungsten halogen lamps seems to be perfect, but this is because the color rendering index itself uses black body radiation as the benchmark at low color temperatures. In fact, in recent years, academia has advocated examining the two factors of GAI and CRI as standards, while incandescent and halogen tungsten lamps are not very good in GAI. The specific manifestation is that they have poor color resolution and feel annoying. For serious study and work, it is recommended to choose a higher color temperature light source, such as 4500K-5000K color temperature, which is close to the natural sunlight outdoors, which is more suitable.

3. In theory, LEDs should not flicker, but due to cost and PF (power factor correction) reasons, most of the current drivers will flicker.

In short,

If you want to be economical and cost-effective, it is recommended to choose a three-color energy-saving lamp with a color temperature of 4500-5000K.

Previous: Introduction to the knowledge of heat dissipation and light distribution of LED street light sources Next: What does the IP65 rating of LED lamps mean?

Ms. Anny

Email:

Send Inquiry

Tel:86-514-84230418

Fax:86-514-84238418

Mobile Phone:+8618852753718

Email:

Address:Lingtang industry park,China,Gaoyou city, Yangzhou, Jiangsu