for this animation I wanted some glowing panels to light up in a random order. So I created a particle set and used the particle index and compared it to the current frame index using a "less than" Node. Based on that comparison I switch between a diffuse- and an emmision-Shader by using the result of the comparison as the mix factor.
you can download the blend file here
Volumentric emission shader
AN experiment - mesh from particles
Dynamic Paint particle growth