Hi forum,
first of all i wanna inform you that i am new on the camera topic. 
 
So here is the problem:
I have a Nikon D3100. An old camera, but a good DSLR camera. It gets the job done. 
I recorded this clip with 1/24 shutter-speed. While i pointed my lamp (6000 Kelvin, Daylight) on it. 
This...