Hi Lucy;
First, the word is Limelight. (n. 1. A focus of public attention) freedictionary.com
The second sentence is closest to correct. However, neither sentences tell us "what" should/ought to be brought out. Life itself?
Life is so significant that the subject ought to have brought (______) into the limelight.
Life is so significant that the subject should bring (______) into the limelight.
I hope this helps,
Stephen