I like being able to punch beams of light at people, but the higher level abilities have a bit too much of the Four Elements "this costs way too much Ki to be worth it" thing; Burning Hands is never worth it, and, while being able to throw a radiant Fireball more or less is great, it's not until level 11 and costs three Ki points to do 8d6 damage, and, by that time, that's likely a bit underwhelming unless you're fighting something vulnerable to radiant damage.

I like the idea of it and the standard "laser beams" attack is great for flavor, but it's just kind of underwhelming in general.