Energy weapons are just as popular, if not slightly more popular, than standard bullet firing weapons.
The highest power output for an energy weapon legal for use by civilians is 12. Military weapons usually go much higher than this. Civilian pistols usually range from a power output of 1 to 5, and civilian rifles are usually a bit higher. power outputs of 1-3 are enough for hunting small game with, while a power output of 30 is enough to pierce 2 inch plates of nova.
Acuracy is measured on a scale of 1-10, 1 being the worst; your shot could go pretty much anywhere. 10 being the best; your shot will hit within a 3 milimeters of the target. An accuracy of 5 is generally acceptable for most pistols, and an accuracy of 7-10 is generally acceptable for most rifles.