How can I add emission node to volume scatter to create cloud light using point density texture node? How can I add emission node to volume scatter to create like this 


using point density texture node? I tried a lot of way but I have not found any solution. I know this node may be looks very complex. But also a way to understand  how to process cycles nodes. If you could help me, I'd very appreciate it.
Have 2 different set of volumes (one very short of emission particles) and the other one to occlude it with a much denser but scattered point cloud. Might work after some texture maths (substract, divide)