Sorry not a light source but I am guessing some of you know the answer about this. Has anyone used these? do they stay warmed up all the time (using power) or do they work off some kind of chemical release and mix reaction. If they are just fluid based (which I found one that for sure is) then where can you get these devices cheaper that can be low voltage triggered for use with a security system
http://www.smokemachines.net/buy-sec...-systems.shtml
http://www.smokecloak.com/en/
http://www.youtube.com/watch?v=dD6KwdVg6f0
http://www.smoke-screen.co.uk/