The effects would last around three more weeks, maybe longer.
God knows how long the effect will last, but it can't be much longer.
The effects can last from a few hours to six days.
The effects can last for up to four to six hours.
"Just tell me how long I can expect the effects to last."
The effect takes more than 10ms to develop and can last for up to a few seconds.
Some effects may last for years and very probably are permanent.
"The effect of the warning might last a few weeks."
Unfortunately the effects of the great clean up did not last more than a few years.
"But the protective effect will only last for about a minute."