To install and burn time: Hab hung fairy lights on a cloudy day in the afternoon, About 15 clock, so that they "fill up" only about 1 to 2 hours of light could. Nevertheless, the big surprise: The fairy lights burning from dusk until the morning at about 5 clock. On the second night, however, then the disillusionment: The fairy lights had to charge all day (under normal winter conditions, partly cloudy and little sunshine hours) and burned down dusk only about 1 hour. Probably the fairy lights on arrival was charged before and therefore burned so long on the first night. Even on particularly sunny winter days no improvement was observed. Meanwhile, I've resigned myself to the short focal length, however, hope for the summer, when I'm the fairy lights (although seasonally slightly inappropriate, but hopefully full effect) continues to hang as Balkondeko.