ooooh

“I don't know, but they say it's not so bright now as it was in other places. Still, even if you'd had your bandages off today, I don't expect they'd have let you watch it. You'll have to take things gently at first, and some of the flashes are very bright. They -- Ooooh!” “Why ‘ooooh’?” I inquired. “That was such a brilliant one then - it made the whole room look green.”

1951, John Wyndham, The Day of the Triffids, Harmondsworth: Penguin Books, published 1954, page 13