Sᴛᴀʀᴇ ᴀᴛ ᴛʜᴇ ʙʟᴀᴄᴋ ʟɪɢʜᴛʙᴜʟʙ ғᴏʀ ᴀᴛ ʟᴇᴀsᴛ ₃₀ sᴇᴄᴏɴᴅs

black light bulb
then immediately stare at a white area on the screen or at a sheet of paper.
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14 thoughts on “Sᴛᴀʀᴇ ᴀᴛ ᴛʜᴇ ʙʟᴀᴄᴋ ʟɪɢʜᴛʙᴜʟʙ ғᴏʀ ᴀᴛ ʟᴇᴀsᴛ ₃₀ sᴇᴄᴏɴᴅs

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