Mr. Miranda, yes, the installation exceeds the requirements of NEC and 101. Recall that the Codes are minimum requirements. This belt-and-suspenders approach provides the occupants with light when all else is dark. Often people panic in the sudden darkness; also, the battery units provide egress lighting when the emergency lighting system doesn\'t operate as designed. Failure to perform routine testiing of engine-generator systems may leave you in the dark. It\'s not enough simply to crank the engine, since the transfer switch system may fail or a feeder or breaker in the emergency distribution system may interrupt power to the emergency lighting panel. I\'ve not had an Owner ask me to take out the battery-op lights once the purpose has been explained.