To disable Camera Module LED, edit /boot/config.txt with sudo right, add the line:
Work for me on Raspberry Pi 3 + Camera Module running Raspbian Jessie.
Setting DISABLE_CAMERA_LED to 1 prevents the red camera LED from turning on when recording video or taking a still picture. Useful for preventing reflections when the camera is facing a window. ~ reference: https://www.raspberrypi.org/documentation/configuration/config-txt.md
- program camera led using Python, Picamera > API - picamera.camera Module > led