Does anyone know if you can install a Flood Light camera to a non-circular, more rectangular junction box?
Glad you asked @Eldurso! The Floodlight Cam should be installed on a 4 inch, waterproof, round junction box for optimal performance and intended positioning. Check out our help center article about mounting the Floodlight Cam for more details 
What are your options if your existing light box is not round? I have a hexagon shape so I can’t use any of the mounts that came with the spotlight camera mounted.