I use almost strictly light armor and I play on Master. My character uses Archery and Dual Wielding a lot and I think Dragons are a breeze.
Its doable. Difficult at first but definitely doable.
Any tips? I don't want to enchant anything, or use alchemy too much. A little bit of smithing is ok.
I find I keep going back to my heavy armor warrior, but I want to play a different style, and I really enjoy the feel of light armor, if that makes any sense.