I want to run a female dunmer that uses one-handed weapons and wears light armor. I never liked heavy armor is all. But, after doing my archer on Master, I kind of don't want to step back down. So is it stupid to do light armor on master if you do melee? I imagine its quite different than an archer on master.

Not at all. Just master Smithing and make some good-quality glass armor. My Dunmer wears glass, and she has an Armor rating of 505, without a shield. That's close to the max, and I think as her LA gets better, she'll likely reach it.

Well, on xbox glass armor is glitched on females T_T also, how about early levels when my smithing isn't up yet?

you can get near maxxed out AR in leather, hide, glass, elven, or any variation, combination or incarnation you desire, hell you can even mix light and heavy armor

the choice is yours

Yep, put a lot of perks into base for alchemy, enchanting, one handed, smithing and light armor and go to town making strong potions to maximize the strength of your armor and weapons and their respective enchantments. Do this and work on stealth to maximize the damage of your initial blows and you can become very deadly. Also focus on getting the enchantment to a 100 so that you can use the dual enhancement on all items to benefit this play style.

its also worth noting that with significant enough ability in smithing and enchanting custom fit and well fitted become unnecessary perks, especially if you plan on mixing armors or not wearing a helmet

I never used heavy armor until my most recent atypical playthrough as a Nord two-hander. Light armor raises just like heavy and builds towards the cap by the same work and effort. The difference initially is so tiny that I find myself considering the choice of heavy armor for him more an image thing than practical. It may be a pain to do it all, but at low levels, casting the oak flesh spell for a boost of 40 and drinking light armor potions leaven your rating well.

The best advice is of course the most obvious, don't get hit. Hard to do, but one of the ironic problems of the stealth mage types I usually play is that even though light armor would (and was in Oblivion and Morrowind) be a major class defining skill if we had classes, it stays in the low 20s long into my higher levels. I wind up having to train it sometimes to get to 30 and take matching set. I've never needed more than that perk and one or rarely two of the agile defender perks to reach 567 without a shield. But then I do take smithing up to 60 for arcane as soon as I can and use four smith boost items and a potion when I make newer suits. I take elven too.