Turn the display into an adjustable white or warm light source for video calls, photography, tracing and close work.
Why this test is useful
Use the screen as simple fill light by moving it closer or farther from the subject and adjusting the device brightness. It is useful, but it does not replace controlled photographic lighting. If the screen must be at maximum brightness and the camera still needs very high ISO, a dedicated light will give more output and control.
Before you start
- Start at the brightness you normally use. Extreme brightness can exaggerate some panel behavior and make the result less representative of daily use.
- If automatic brightness or dynamic contrast keeps changing the image, turn it off for the comparison and restore it afterward.
- Use the screen as simple fill light by moving it closer or farther from the subject and adjusting the device brightness. It is useful, but it does not replace controlled photographic lighting.
A reliable way to run the test
- Use the screen as simple fill light by moving it closer or farther from the subject and adjusting the device brightness. It is useful, but it does not replace controlled photographic lighting.
- Start at the brightness you normally use. Extreme brightness can exaggerate some panel behavior and make the result less representative of daily use.
- If the screen must be at maximum brightness and the camera still needs very high ISO, a dedicated light will give more output and control.
- After an artificial pattern reveals something, check the same area with real photos, video or games at your normal viewing distance.
How to read the result
Use the screen as simple fill light by moving it closer or farther from the subject and adjusting the device brightness. It is useful, but it does not replace controlled photographic lighting. If the screen must be at maximum brightness and the camera still needs very high ISO, a dedicated light will give more output and control. After an artificial pattern reveals something, check the same area with real photos, video or games at your normal viewing distance.
What to do next
- If the screen must be at maximum brightness and the camera still needs very high ISO, a dedicated light will give more output and control.
- When comparing monitor modes, change one setting at a time and use the same test speed, brightness and viewing position.
- After an artificial pattern reveals something, check the same area with real photos, video or games at your normal viewing distance.
What this test cannot prove
If the screen must be at maximum brightness and the camera still needs very high ISO, a dedicated light will give more output and control. This is a visual reference, not color calibration. Accurate calibration requires measurement hardware and a controlled color workflow. The test itself runs in the browser. Hosting, analytics or advertising can still make ordinary network requests if the site owner enables them.