Paid care expenses for dependent age 15 , several times when working over night can i claim the expense

You can only claim it if the dependent "wasn't physically or mentally able to care for himself or herself." Otherwise the dependent care credit is only for care of children under 13.

The following definition is from IRS Publication 503.

"Physically or mentally not able to care for oneself. Persons who can't dress, clean, or feed themselves because of physical or mental problems are considered not able to care for themselves. Also, persons who must have constant attention to prevent them from injuring themselves or others are considered not able to care for themselves."