Many report seeing lights and colors while meditating. What accounts for this common hallucination experienced by many?
After five years of practicing meditation, subject number 99003 began to see the lights. “My eyes were closed,” he reported, “[and] there would be what appeared to be a moon-shaped object in my consciousness directly above me, about the same size as the moon if you lay down on the ground and look into the night sky. It was white. When I let go I was totally enveloped inside this light… I was seeing colors and lights and all kinds of things going on… Blue, purple, red. They were globes; they were kind of like Christmas-tree lights hanging out in space, except they were round.”
Subject 99003 described these experiences to Jared Lindahl, a researcher from Warren Wilson College in Asheville, North Carolina, who has spent years scientifically studying meditation. He and his team are the midst of a large study on meditators and their experiences, and in a recent paperthey homed in on a peculiar experience many of them share: mysterious lights that appear in their mind’s eyes as they practice.
To figure out just where these lights might be coming from, Lindahl and his team talked to 28 meditators for an average of 77 minutes each. Nine of them reported “light experiences,” with descriptions much like subject 99003’s. “Sometimes there were, oftentimes, just a white spot, sometimes multiple white spots,” one said. “Sometimes the spots, or ‘little stars’ as I called them, would float together in a wave, like a group of birds migrating, but I would just let those things come and go.”
Another said: “In concentration I’ve had rays of white light that go through everything. They’re either coming from behind me somewhere or coming out of the object that I was concentrating on… I saw it with my eyes open and it wasn’t really seeing it was something else, even though I still was perceiving that I was there.”
Buddhist literature refers to lights and visions in myriad ways. The Theravada tradition refers tonimitta, an vision of a series of lights seen during meditation that can be taken to represent everything from the meditator’s pure mind to a visual symbol of a real object. In one Buddhist text, called The Path of Purification, the nimitta is described this way:
It appears to some as a star or cluster of gems or a cluster of pearls, […] to others like a long braid string or a wreath of flowers or a puff of smoke, to others like a stretched-out cobweb or a film of cloud or a lotus flower or a chariot wheel or the moon’s disk or the sun’s disk.
Other Buddhist traditions also refer to lights during meditation, but Lindahl points out in the paper that “there is no single, consistent interpretation of meditation-induced light experiences in Buddhist traditions.” And yet the appearance of lights isn’t a fluke occurrence—it’s something that many meditators experience, and that many traditions have tried to incorporate and explain.