During daylight the no ir camera is working correctly. But i wish to take photo during the night o very low light I add a IR led lighting (850 mn) and suposedly strong enough but I get a black photo. is it needed a special config or parameter with raspistill ? Or is it necessary to have a special IR lighing?
The parameter is -ex night. IR led 850nm is correct. As ppumkin writes check IR led's function - if you see nothing, point to the cam with your TV's or similar remote controller - press a button on it and you should see light.