A reasonable person would assume that it works during the day. Of course it won't work by starlight. I have no idea how common this configuration is, but it ma

A reasonable person would assume that it works during the day. Of course it won't work by starlight. I have no idea how common this configuration is, but it makes perfect sense. It is almost like a battery-capable system, but without the batteries installed. This configuration makes sense because batteries are expensive, bulky, and hazardous. Day-only usage is still useful.