Why are paranormal invistigations done in the dark?

Question

And why does a camera pick up figures not seen by the human eye.

And Why does a tape recorder pick up sounds not heard clearly?

Also, do the tape recordings need to be slowed down in order to hear what is paranormal?

Answer 1

Most spirits will not come near strong physical energy. (e.g. light bulbs) Therefore paranormal investigations are done in the dark.

Answer 2

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Answer 3

they are dont in the dark for more effect! they can be done with the lights on to ! or least candle lights!

out eyes dont often see what we are looking for, the camera lense sees all

i dunno here btw lol tho think its a good guess