How to make light effect

I want to do something like a halo going out of a lamp, but not like that halo in Unity…

…you know, to give that lamp light effect during night, where little bugs keep flying around it :slight_smile: … looks like some smooke around… I tried to find some good picture in internet, but did not find any good one.

Anybody know how to achieve this? I tried some ways and so far not good… :lol:

http://forum.unity3d.com/viewtopic.php?t=18570

http://forum.unity3d.com/viewtopic.php?t=2786

Thanks… my search did not work because I did not know a good word in english…