sunshine, sunscreen and spf

Finally, there are some answers the the many questions I had about sunscreen.  Specifically, what really is the difference between different levels of SPF protection and is there really a point where it doesn’t quite matter? And, how much and how often should it be applied?  Confused by SPF? Take a Number gets to the bottom of the SPF wars that have large HBA companies churning out products with 80+ SPF!  This article argues that all those higher SPF numbers are likely to yield is a false sense of protection.  I know that back in my day it was all about baby oil and suntans.  Boy, the times sure have changed.