As it currently exists, Lightwell is pretty much nonexistent in the game as a used ability. Not only have I never seen it utilized, but people are so disparaging of it that I have seen posters stating they actually boot healers from their party who drop one as a means of healing.
Though it may never be good for a dungeon crawl, I suggest it could still be of use as a communal healing spell. If the party requirement for its use were removed, you could drop a lightwell anywhere you see a needy player in distress - as opposed to needing to stay and tend them as they fight, given its ten charges.
Players often buff strangers, especially lower level friendly players, just to be nice...to help build a little positive community feel in the game. Lightwell could be a similar spell. If the party requirement for use were removed, it could become a great gesture of good will, especially towards new players and lower level toons. As a community helper, I know I would love to use it this way.