You probably won't believe me on this, but I will tell you anyway. 
Somehow, I managed to influence my dreams by light. I have roller wooden window blinds on my window. And my room is oriented towards south-east so that there is a lot of sunlight early in the morning and all the way until early afternoon. So far I was rolling down my window blinds just enough to darken my room somewhat, but a couple of days ago I decided to roll them down almost completely to the bottom, so that now the light shines only through the lines between wooden planks. I also have window shades, so the light in the room with this setup is very soft, yellowish and bright enough that you can read but not enough to disturb my sleep. And that somehow changed my dreams. There is some kind of extra quality to them. But it doesn't work if it is cloudy, there has to be direct light on my window.
I remember that Clark Elliot said that sleeping with his prism glasses made his dreams more productive, and it seems that I achieved a similar effect. But I have no idea how to interpret what I have done. What aspect of this light setup has such effect?

Somehow, I managed to influence my dreams by light. I have roller wooden window blinds on my window. And my room is oriented towards south-east so that there is a lot of sunlight early in the morning and all the way until early afternoon. So far I was rolling down my window blinds just enough to darken my room somewhat, but a couple of days ago I decided to roll them down almost completely to the bottom, so that now the light shines only through the lines between wooden planks. I also have window shades, so the light in the room with this setup is very soft, yellowish and bright enough that you can read but not enough to disturb my sleep. And that somehow changed my dreams. There is some kind of extra quality to them. But it doesn't work if it is cloudy, there has to be direct light on my window.
I remember that Clark Elliot said that sleeping with his prism glasses made his dreams more productive, and it seems that I achieved a similar effect. But I have no idea how to interpret what I have done. What aspect of this light setup has such effect?