Meanings of electric brilliance in English

Hands with broken fingernails reached down for her from the electric brilliance.

A human hand flashed white in the electric brilliance.

The black shape rose for a full second before the electric brilliance vanished and darkness folded in again.

And through the gloom a flash-light leaped and waned, flickered and died and gleamed again with electric brilliance-theWinnaker(?)

Northwards, beyond and above the trees, the Internal and External Secretions factory glared with a fierce electric brilliance from every window of its twenty stories.