When the power goes out, so do the lights. A flashlight at each desk is inexpensive and ensures minimal lighting. Everyone should know how to leave the business safely without power, if that s the best decision at that time. When the power goes out lighting may be a relatively small problem. If your building has an elevator, make sure you know its emergency procedures for an evacuation.
Many businesses have alarms.
A simple phone call or alarm system review may inform you if your system has a battery backup. If not, this may be something you want to evaluate. The same goes for any safes or security measures that are electronically controlled or monitored. A blackout goes beyond your business. Remember it is the grid that goes out in which you are located.