Simple glow text effect

First make a new document with white background and write some text in it to make it look like this:Convert text layer into raster and make then duplicate text layer. Go to layer palette and turn visibility off for duplicate layer and edit the text layer. Setting should look like this:
Now select Flood fill tool and color the text into glow color. I chose blue and that layer should now look like this:Go to Adjust menu select Blur > Gaussian blur effect and apply it. With radius parameter you can select how big your glow will be. My setting was 8 and got image like this:
Now select background in layers palette for editing and paint it black. Turn the visibility on for the copy of text layer and you should have something like this: