How to switch on/off spot with fog in rendered animation

Hi There,

I am working with rendering LED Lights in industry, I have used 4 spot lights (with fog)to turn On while passing a particular time, now when i want to create a Photoview rendered animation. The fog (spot light) still stays on the screen... it's not turning off at all.

Is there any way to switch if off, and glow with spot light when it is turned on.

Can we do animation render at that time?

It would be of great help

Thanks,

Sai

Attached image for your perusal

SolidworksPhotoview 360