I really like that. Daydreaming is like having your head in the clouds and often you're having ideas when daydreaming. So when the light bulbs are interpreted as a symbol for ideas (just as I do now), the picture is telling wonderfully much with few strokes.
Not so trivial why you named it like that. I suppose that clouds make you want to let your mind wander while turning on the light is a way to chase away the night ? Anyways, it is a very nice picture that suits the title (or vice versa) very nicely !