If your commercial premises are small with a simple layout you may not need a fire exit sign.
Fire exit door signage requirements.
Fire exit signs are not a requirement if it is obvious where the exit is for example when there is just one door at the front of a small shop where it is clear that would be the.
1910 37 b 4 if the direction of travel to the exit or exit discharge is not immediately apparent signs must be posted along the exit access indicating the direction of travel to the nearest exit and exit discharge.
Also the line of sight to an exit sign must be clearly visible at all times.
Each exit route door must be free of decorations or signs that obscure the visibility of the exit route door.
If there is a fire in the area where occupants are they are already being exposed to smoke fire and heat.
Also under internally illuminated the life safety code section 7 10 7 2 details the illumination requirements for photoluminescent signs.
The nfpa emergency exit door requirements code states there is a maximum travel distance allowed to find an exit.
Post signs along the exit access indicating the direction of travel to the nearest exit and exit discharge if that direction is not immediately apparent.
An exit sign or similar designation with an arrow indicating the directions shall be placed in every location where the direction of travel to reach the nearest exit is not immediately apparent or as directed by local fire marshal.