Re: Green Lantern Object Creation...
Technically, a Green Lantern Power Ring would do ANYTHING that someone willed it to do, so the effects are left up to the imagination. Over the course of the comics, Green Lantern's have done some pretty freaky things, including creating pure-energy constructs that were temporary, permanent, semi-permanent, etc.; to rearranging matter; to time-travel; FTL; co-location; and...oh...collapsing the space-time continuum in on itself (Parallax did that with the Central Power Battery he absorbed in the Zero Hour miniseries).
This, of course, defies codification in Hero System rules (or any game system). Generally, you have to pick the "basics" -- flight, force field, TK-Frc Wall-Entagle energy constructs (however you build it), FTL, etc. -- that your character likes and build those.
As someone else said in the thread, that's the problem with turning ANY comic character into a Hero System PC, there's always stuff that gets left out. I mean, Superman, Firestorm, Rogue, etc. all have the same issues -- powers that don't cleanly come over into rules.
Just choose what you "need" to have fun and go with that!