If your talking about the ol’ moving light source “sheen” effect that one thinks of with corporate logos, there are two simple methods:
1. One use CC Lightsweep. Built into AE 6 and 6.5.
2. Or duplicate your logo, on the top dup, cretae a tall rectangular mask that is about half a letter wide. Feather it heavily. Animate it across your logo. So in the end your getting a chunk of blurred logo revealing across the length lf the words. Then on this duplicicate, set it to ADD transfer mode.
If you want to modify it from there, you can add a levels and make it more intense, or color tools to change the hue/tint, etc..
Chris Smith
https://www.sugarfilmproduction.com