Q. Can you make the birchas hailonos at night seeing the flowers by artificial light?

A. Tzitz Eliezer (12: 20) rules that you can recite the brocho if the flower-fruit buds can be clearly seen an appreciated even at the light of the moon. Horav Shlomo Miller Shlit’a ruled similarly (See also Piskey Teshuvos 226: 3)

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a