There's no guarantee that the payouts or investment objective of these funds will be met. Poor investment performance will result in the payouts being reduced. Higher returns will result in additional income being available. They are not annuities theoretically guaranteed by an insurance company.
Please, let's not start another annuity thread.
I would recommend a diversified portfolio similar to a version of whatever Couch Potato portfolio you are comfortable with. You're a new member to the forum (welcome!) so if you aren't familiar with these please google Scott Burns and read some of his articles of Couch Potato investing.