They might be sprites actually. Just add in a little light entity along with them
Make a specific type of sprite if you don't already have it and put them all over the room.
Make them activate at different times (a multi-manager might come in handy) so that it looks like there are twinkling stars all around your room!
If you need to make a sprite, go here.
http://www.cstrike-planet.com/files/32