The warm-end temperature can drop into the 80s to the high 70s at night as long as it reaches 90 during the day.
(The warm-end temperature; can drop; into the 80s; T:at night; T:as long as it reaches 90 during the day) (it; reaches; 90; T:during the day)
The warm-end temperature it
can drop reaches
into the 80s T:at night T:as long as it reaches 90 during the day
90 T:during the day