You mention a 9 V Battery Are you talking about the ones That you use in the smoke alarms??
We use the Leds In our Theater With 9v Battery I suppose that we couldn't bye And use one of those setups I'm sure that they make in green or blue Or any other color there that you would like to use I know for sure if you compile them That they would be very bright Thank you For the suggestion Of used The 9v Battery.