One of the most common reasons people buy life insurance is for income replacement.  PacLife has a handy insurance calculator that you can use as a guide http://www.pacificlife.com/Channel/Educational+Information/Calculators/How+much+life+insurance+do+I+need.htm

Just choose a death benefit level and make your regular planned premium payments knowing that your death benefit is guaranteed.  You beneficiaries will receive a death benefit that generally avoids probate and is received free of state and federal income taxes.  If structured properly, it may also be distributed free of estate taxes.

One of the nice things about universal life insurance, is that it has a flexible premium.  If your financial situation changes, you can adjust your premium payments or increase or increase or decrease your death benefit.  Some companies even allow you to make catch-up payments to restore your policy to it’s original guarantee period.

You can also access policy cash values through withdrawals or loans.  Some policies even allow you to access part of the death benefit under certain conditions.  Some companies even guarantee that if you surrender your policy after the surrender charge schedule, they will return a percentage of your premium as high as 100% in some cases.

So, if you are looking for a policy that is guaranteed for the rest of your life no matter how long you live, universal life insurance may be the right choice.