I'm with Stinky......and not spray ANYTHING on plants in the dark......it simply BEGS for mold/fungus issues.

Konvict they make this little led green light....sold at my hydro store that is considered safe in the dark period. I don't know enough about lighting to know why THIS type of green lighting is ok...but not some other types of green lights. A good friend of mine hermied his grow with the little green light on his dehumidifier so obviously not ALL light is created equal.