It has been a while since I have played Flare, decided to do a play through this weekend and enjoy the progress.
I however prefer red health bars, I edited them and liked the end result, I made it into a mod so I can easily use it again in the future.
As it may be of interest to others, I though why not share. :)

You can download it from here:
http://www.physhexgames.weebly.com/uploads/5/9/6/4/596446/red_health_bar...