[@Renny] Your character is pretty OP that's for sure. But a kriptonite type weakness could be a good answer. But instead of it being some kind of strange space mineral, how baout it's something more common, like Iron? (It doesn't have to be Iron) I'm just thinking it could be itneresting for him to have to deal with losing his powers fairly often, and working his way to getting them back. Or perhaps he has to be in direct sunlight? They say superman's powers are tied to the sun, the more sun he gets, the stronger he is. Perhaps being in the shade severely ddecreases your power, while at night you have none at all. Could be a good compromise? 


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The sunlight thing could  that [@Yin Jingshin] brought up could be and interesting in dynamic with my character who can only use her powers in dim - to pitch darkness. She also keeps smoke bombs to generate darkness when none are readily available. So maybe he could have a way of generating artificial light. Just an additional thought.