This may be relevant.....
Maskelyne came up with the unorthodox idea of constructing 21 'dazzle lights' along the length of the Canal. These powerful searchlights, containing 24 different spinning beams, projected a swirling, cartwheeling confusion of light up to nine miles into the sky. A barrage of light to confuse and blind the enemy bombers, which Maskelyne dubbed Whirling Spray.
Fisher claims that this radical defensive shield of light was highly effective and was a major reason why the Suez Canal remained open for the duration of the war.
From the book: The War Magician
Whirling Spray
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