The light range and the dead angle of the ceiling lamp
Show you the curves of several lamps: the first one is better than the second.
Regular lighting products are equipped with light curve diagram.
You should buy Lamps and lanterns, first ask the store to the light distribution curve of this lamp, from the light distribution curve of the lamp, you can see there is no dead angle, and then decide whether to buy or not.
[or all ceiling lights have this common problem? Also asked professionals to answer] is not a common problem
