How do I get 'glow' to work?

I use the WindLight viewer most of the time and I've noticed more and more objects with nice glow effects. However, when I try to get an object to glow it won't. I check the 'glow' option and the level indicator can be altered. I set the 'light' option and also 'full bright' and the object illuminates the surrounding surfaces and looks bright but still no glow around it. Am I missing something? The comp is clearly capable of seeing glow as I see it elsewhere.