one-hour
one-hour long

Games can last from five minutes to well over an hour.

I use to also take a half hour before bed and now its taking up to two hours to work.

On other days, students may work up to 8 hours a day.

Each worked 5 to 7 hours a day, and for all but 8 or 12 weeks a year.

They last either one week or eight days, meeting for two and a half to five hours at a time.

Since then the time has been cut to 31 hours.

If you do, the stay is usually no more than 24 to 48 hours.

I used to do an hour and a half to two hours a day.

The culture results, as in the past, may take up to 48 hours.

The working day for these children is up to 15 hours long.