A modular floodlight system comprising: a floodlight device comprising: a main housing having a generally cylindrical shell with a central axis intersecting opposing first and second ends of the main housing; first and second light subassemblies (106-1, 106-2) connected to the main housing at lateral sides of the shell that are substantially parallel to the central axis, the main housing positioned between the first and second light subassemblies (106-1, 106-2), each of the first and second light subassemblies (106-1, 106-2) including a light housing; and a passive infrared, PIR, lens positioned on a side of the main housing and between the first and second light subassemblies (106-1, 106-2), the PIR lens having a dome shape that houses multiple PIR sensors configured to detect motion of an object within a field of view of the multiple PIR sensors, the modular floodlight system being characterized by: a magnet mount assembly attached to the first end of the main housing, the magnet mount assembly including: a front surface defining a plane that is non-orthogonal to the central axis of the main housing; and a magnet providing a magnetic force configured to act on a metal part of a modular camera device to magnetically secure the camera device to a magnet mount, wherein: the light housings of the first and second light subassemblies (106-1, 106-2) each have a general cylindrical shell with a rounded cap; and the dome shape of the PIR lens protrudes from the side of the main housing. a main housing having a generally cylindrical shell with a central axis intersecting opposing first and second ends of the main housing; first and second light subassemblies (106-1, 106-2) connected to the main housing at lateral sides of the shell that are substantially parallel to the central axis, the main housing positioned between the first and second light subassemblies (106-1, 106-2), each of the first and second light subassemblies (106-1, 106-2) including a light housing; and a passive infrared, PIR, lens positioned on a side of the main housing and between the first and second light subassemblies (106-1, 106-2), the PIR lens having a dome shape that houses multiple PIR sensors configured to detect motion of an object within a field of view of the multiple PIR sensors, the modular floodlight system being characterized by: a magnet mount assembly attached to the first end of the main housing, the magnet mount assembly including: a front surface defining a plane that is non-orthogonal to the central axis of the main housing; and a magnet providing a magnetic force configured to act on a metal part of a modular camera device to magnetically secure the camera device to a magnet mount, wherein: the light housings of the first and second light subassemblies (106-1, 106-2) each have a general cylindrical shell with a rounded cap; and the dome shape of the PIR lens protrudes from the side of the main housing. a front surface defining a plane that is non-orthogonal to the central axis of the main housing; and a magnet providing a magnetic force configured to act on a metal part of a modular camera device to magnetically secure the camera device to a magnet mount, wherein: the light housings of the first and second light subassemblies (106-1, 106-2) each have a general cylindrical shell with a rounded cap; and the dome shape of the PIR lens protrudes from the side of the main housing. the light housings of the first and second light subassemblies (106-1, 106-2) each have a general cylindrical shell with a rounded cap; and the dome shape of the PIR lens protrudes from the side of the main housing.