Another vote for light, with the caveat that there's no wrong choice. Strings are cheap (relatively speaking). Play around with it to see what gives you a sound that suits you.
I usually use D'Addario for a brand and shuffle around between their silk 'n' steel, phospher bronze, and whatever else I feel like on any given trip into the shop. I do not recommend the D'Addario EXP coated strings. I've got some on now and don't care for the feel. But maybe you would.
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