I put the meter to our lights last night. 5.1A on the tree (11' tree), and another 1.8A on the railing (about 26 linear feet of railing). I tried to get my wife to tell me how many strings she used... her answer? "all of them" lol. Apparently she lost count. I reckon it's about 20 or so.
Will cost roughly $27 to light 18 hours a day for a month.
I put an amp clamp on a couple lines the other night and realized I went a little crazy with the lights this year. The one tree is drawing 12amps by itself.
At my old house, we used lights around our porch roof year round. Always felt really welcoming when I would come home at night, but strings would burn out quite frequently.
I bought a bunch of LED strings at the local after Christmas clearance; 75% off and they had lasted at least 2 years (still burning when I moved out).