The photo can be used for commercial purposes.
This is a night photo of a pond called Peklo (Hell in English) located in Kolín, the Czech Republic.
In the picture, you can see in detail silhouette of a willow tree on the left bank. Every twig is well visible against the deep blue sky. The opposite shore is reflected in the water.
We used a tripod and long exposure time to capture this photo. It was relatively windless at the time of the shooting and the pond surface was calm. The sky was without significant clouds.