Very nice, but a lot of sunlight needed

Have on my balcony no outlet, so I absolutely for the Christmas season
a string of lights with solar needed. At first I was excited. Charged in sunlight, burned
it until the morning. The next day it was a bit overcast and it burned in the evening only very weak and a maximum of one hour.
Big disappointment! But if the sun shines all day, it burns evening lange.Das light is warm. On my covered patio it burns but also bad. The solar module thus needs a lot of sunlight to recharge. Therefore, only conditionally recommendable.