Canon 70d turns off the yellow light like this.

This light of Canon SLR camera 70D will light up in two situations:

1, self-timer indicator. When using the self-timer function, the self-timer indicator will light up two seconds before shooting. When the self-timer function is not used, the self-timer indicator goes out.

2. Reduce the red-eye indicator. In flash photography, as long as the shutter is pressed halfway, the red-eye indicator will light up. See the figure below for the closing steps (screenshot of Canon 70D manual).