First, try adjusting the brightness slider at the bottom of the screen of the Control App. Move the slider to the far right to brighten the video.
The second option is to enable Low-Light Mode. To access the setting:
Open the Pixellot Control app.
Open the recording screen.
Select the gear icon at the bottom right labeled Settings.
Turn on the Low-Light Mode using the button on the far right. After selecting it, the setting should be labeled On.