I found while putting your cursor over the infusion button it says that you can infuse things up to 360 power which at the moment you can't. The max is 330 and 335 with legendary mods. I believe Bungie may have added that on accident or as a hint towards the next DLC power level in the newest update. It'll appear when you put your cursor over the infusion button. Read the description and it'll say it.
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It used to say 330 before CoO, so that would make sense. Plus DLC 2 would be just as much of a power boost as dlc 1.