The upped name just seems a little odd to me... Maybe "Angel of Illumination" or something, brightness fits the idea but just doesn't have as nice of a ring as Angel of Light.... But I might just be getting too picky.
Otherwise I think this card is really cool. The second version seems pretty well balanced. The creature itself is tougher than FFQ and wont require a duo to function, but since ray of light is much weaker firefly and photons require luciferin to function it should be good.
I love the artwork on both versions by the way.
Very nicely done card.