Not sure about the white glow effect. But the light shining behind text moving from left to right can be achieved with the Luce plug-in in Premiere Elements. It is a great effect but takes some time to render. Take a look at the link below to Muvipix, it gives a link to the plug-in and discusses it's use.
Thanks Paul. That's similar to the text effect I'm looking for but I'm sure I've seen another where the effect was done from scratch. I'll keep searching the internet for the example that I saw a few weeks ago.
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Not the tutorial you are looking for, but here's one that is very similar in principle from Curt Wrigley. It was done in PrPro2, IIRC, but can be easily interpolated into PE. You might also want to work a bit with Levels Effect on the "dupe" footage on Video Track 2.