What did my client’s daughter experience when she perceived she was taken out of her body into a lightbulb nearby, as witnessed by her brother? Why would they do this?

This was accurately perceived by both children. It was an out-of-body experience and excursion done for purposes of scaring them and creating great fear. There was no particular energetic connection, only that it created a quite unusual experience and was a demonstration of the power of their spirit meddler attachments.