Question

what is dark lightning​

Answer 1

Answer:

Light that is so discrete you can barely see the light source can be termed dark light. ... Instead of having bright areas of light dominating a space, dark light luminaires can be used to create a discreet lighting setup where it is hard to notice where the light comes from.

Answer 2

Answer:

But scientists recently discovered something mind-bending about lightning: Sometimes its flashes are invisible, just sudden pulses of unexpectedly powerful radiation. It's what Joseph Dwyer, a lightning researcher at the Florida Institute of Technology, has termed dark lightning.