Christmas illumination

Hi. Did you see a lighting ceremony of Aoyama Gakuin University? These days, there are many beautiful illuminations everywhere in Tokyo. They are so beautiful and we can enjoy seeing them. However, it has bad aspect. It uses much electricity. So it would become the cause global warming. And I heard that it is bad for trees to have light. To see illumination is fun, but it has bad effect for nature. What do you think about it?