The sensor recorded a total of 150 lumen-hour during the test period.

We still remember that evil hour when everything went wrong.

An equal hour, defined as one twenty-fourth of a full day-night cycle, remains constant in length regardless of whether it falls during daylight or darkness.

The astronomer adjusted the telescope schedule to account for the varying length of each seasonal hour.

I'll be ready in half an hour, so please start without me.

She arrived in my hour of need and changed everything.

Each engine hour logged on the maintenance record is crucial for scheduling inspections.

We decided to organize a power hour at the bachelor party, even though we knew it would be brutal by the end.

We decided to photograph the city skyline during the blue hour because the soft blue tones made the lights look magical.

They resolved the budget crisis at the 11th hour.