I agree completely. You are running low. But the advice above about cleaning all your connections first has alot of merit.
Both ends of ALL the cables. Trace them out, find where they go, disconnect them, clean with a wire brush, and reassemble with dielectric grease. Clean where they mount TO also.
Then see where you sit. If the voltage is still low, and you still flicker, change your alternator and battery as a pair if the battery is over a year old.
Use a DECENT alternator. Advanced Auto and NAPA seem to have the best reputation on rebuilt alts, Autozone seems to be the worst. A good battery can go a long way towards extending the life of an alternator as well. If you can afford an Optima Red Top, do it. Otherwise get a GOOD battery.