First Light

When a telescope or astronomical instrument is first used to take an image after construction.

I just started to build a 100 meter optical telescope in my backyard: first light will be in 2038.

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First Light

The first lighting of the sky after night and before dawn when the stars begin to dim. Surfers first check the waves at this time.

Hey dude, I'll meet you at Cardiff at first light to shred the gnar-gnar.

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love at first light

Waking up in bed with someone, not remembering the night before, but instantly falling in love with them as soon as you open your eyes.

Johnny didn't remember how he got there, but when he woke up in the morning next to Mary he knew that was where he wanted to wake up the rest of his life - it was love at first light.

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