Q. Can the blessing for the new fruits on the trees be said at night, if there is light?

A. Although Horav T. P, Frank zt”l (quoted in Yain Hatov 1: 48) rules that birchas hailonos should not be recited at night, many Poskim permit when needed and there is enough light to see clearly the budding in the fruit trees. (Tzitz Eliezer O.H. 1: 118 – 12: 20, Porach Mateh Aharon p. 163, Birchas Yosef 121: 3, Maadanei Daniel 226: 5, Rivavos Efraim (O.H. 6: 458, et. al.)
Horav Shlomo Miller’s Shlit’a opinion is similar.

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