I used to do the same thing, as apart of my rituals. Turn all the lights off and meditate in complete darkness in the centre of the room. I noticed that the more active the ritual is, the more vivid and clear dreams become.
The rituals were a vital way to keep my mind focused, while also letting go of everything.
I still like the dark and going for walks at night to see the moon.
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How time flies bye? Through Quantum time. "Bye!" said the time fly.