Yes, you'll need Two panels. I was hoping maybe for door opener or something with low watts.
That being said......................
You might try seeing how many watts those rope led lights are?
I'm using them in and around my coops.
You might still be fine with only one panel.
You on right track LEDS are definitly the way to go in your situation.
Solar panel ratings are kind of like generator numbers meaning when generator says 5K watts that is peak usage.
Same deal with panel it can do 15 watts in best condition.
That is why that battery is so important.
Good to see you going solar.
I think in your application you'll get your money back before end of the life of the product which isn't always the case.
After last year when it took months to get back to laying good this year I put up led lights.
The lights really hasn't jump started them. GRRRRRRRRRRRRRRRRR!!!
So frustrated getting 2 to 3 eggs a day just don't cut it for ten chickens.
My first two years I had excellent egg laying through out the winter but last couple of them been bad.
Those eggs starting to remind me of fish you catch.
You add up the expenses to go fishing, equipment, etc, they better taste real good.
Way I look at the chickens is at least it's a food I can control what I am eating instead of most of the food at our stores full of chemicals etc I hate to even think about it.
My goal is to learn how to garden better.
Store my food better.
Find resources of people I can buy food from that raise their animals right.
No way can I eliminate food from the stores but my goal is to cut down as much as I can.