Move camera to a object,it's light will be flash

in the editor,when I press ‘w’ to move,some object in my scene will flash,like shake the light, you can see two picture:

99531-1.png

99533-2.png

the first picture is when I stand far,and the second picture is I Press "w’ to close it ,it seems the light changed ,but I don’t want this,why appear this phenomenon ,or how to solve this phenomenon ? Thank you!!