Light is a Soul Demon. Much like Water, Earth etc. It moves through this relm and many others. In our relm we can easily control it at will if it has chosen us. But in the otherworld... it can persuade us.
Light is not necessarily good. But it is calm and peaceful. These people are with the light often and live in high places. They also tend to be talked to at day. Creatures of night are powerful but forgiving.