There are many purposes for using a motion activated security camera. Portably, the most popular reason for using the motion activated security camera is to conserve electronic resources. On the other hand, these cameras may be used for an entirely different reason; to provide alerts like an alarm system when something is there.
Talk about "getting caught in the act," that's exactly what security lights with camera will do. Using a security lights with camera device will not only illuminate the subject with a flood of high wattage bright white light, but it will take still pictures or video images of them too.
An outdoor wireless security systems alarm is usually some sort of motion detector sensor(s) that when actuated initiates some sort of audible or silent signal. There are several variations on this theme, including digital video camera systems that can function as an outdoor wireless security systems alarm. However, the purpose of any of these variations is the same; alert the user when a defined boundary or perimeter has some sort of motion-detectable activity and do it by using sensors that do not require wired connections.