iphone2 phone on eye-protection lamp with big brand name in China Market

The horizontal or vertical stripes are flicker light, flicker induced myopia; Some new version mart phone can not capture the flicker stripe for some new phone has anti-shake function to average several images.

If the camera cannot capture the stripes, it does not mean there is no flicker, you have to use an oscilloscope to check the AC voltage component across the lamp LED. if it is a straight line under 10mv, there is no flicker.

1. There is an eye-protection lamp with top sales on Amazon:

You can not capture the flicker stripe with your iphone2, then you need an oscilloscope:

The AC component of the voltage across the lamp is above 3 volt as the DC voltage is 12 volt, the percent flicker is close to 3/12=25%, that lamp has very high value of percent flicker, that is harmful to vision, they still call that eye-protection lamp.
refer to the test video:
https://youtu.be/2z6gUob995I

2. One lamp sales very well with big brand name Fe*t, you can not capture the stripes with Iphone2.

when I use an oscilloscope to capture the waveform, the AC voltage can reach almost 500mv, that is high flicker resulting in eyestrain and myopia after long time exposure.

https://youtu.be/wV7Fs-YDSis

3. I found another lamp on Amazon: https://www.amazon.com/dp/B00IJZJ6ZS

Then I used the oscilloscope to measure the AC component and found it is 0, that means it is true 0 flicker lamp. check: https://youtu.be/xJNs7RLKNAg

The official way is to measure the percent flicker of flicker index.

You can check http://www.uprlt.com That is the only 0 flicker lamp in U.S. market.

As above, that is the lamp market in U.S., now we explore the eye-protection lamp in China.

Brand name: HAISHIBAO, fluorescent eye-protection lamp, vertical stripes are flicker

HAISHIBAO fluorescent eye-protection lamp, flicker is shown as the photo above

POSH fluorescent eye-protection lamp, horizontal stripes are flicker light

POSH fluorescent eye-protection lamp stand

Philips LED eye-protection lamp, the gap between the stripes are small, that is high frequency flicker

Philips LED eye-protection lamp with RMB 599

Philips LED eye-protection lamp with price at RMB524, horizontal stripes show there is a flicker

PHILIPS eye-protection lamp with price RMB524

Philips LED eye-protection lamp with price RMB 439, vertical stripes show there is flicker light

Philips LED eye-protection lamp with price RMB439, the flicker photo is above

Philips LED eye-protection lamp with price RMB734, the horizontal stripes show there is a flicker

Philips LED eye-protection LED lamp with RMB734, the flicker photo is above

Philips fluorescent eye-protection lamp with RMB576, the horizontal stripes show there is a flicker

Philips fluorescent eye-protection lamp with price RMB576, flicker photo is above

Philips fluorescent eye-protection lamp with price RMB177, vertical stripes show there is a flicker

Philips fluorescent eye-protection lamp with price RMB177, flicker photo is above

HUAXIONG LED soft-protection lamp, the stripes are very close, there is still a flicker problem.

HUAXIONG LED soft-protection lamp, flicker light is shown above.

YANKE LED desk lamp, the gap between the stripes are very narrow, there is a flicker

YANKE LED desk lamp, the flicker photo is above

OPPLE LED eye-protection lamp with price RMB299, the horizontal stripes are flicker

OPPLE LED eye-protection lamp, flick light is above

MKD LED eye-protection lamp with price RMB389, the vertical stripes are flicker

flicker light impact on people’s health