2 votes for Gossen SBC meters. APUG member wclavey owns 2 SBC meters and I have a third. As I recall, Westley has a Luna-Pro SBC and a Lunasix SBC. I have the Luna-Pro SBC. They work and they work without benefit of light. Well, almost.
I also have an original Luna-Pro with cds cell as a backup. I haven't used it since I got the Luna-Pro SBC.