With our new low lux camera and high resolution, 30 fps DVR delivered to the office after reading Covert investigations: cameras and recording devices, it’s time to catch our finger-painting bad guy who is still targeting the late night halls of the corporate office. Measure and sketch the area to be under surveillance, take photographs of the scene and document everything. Measure the area’s lighting, power, accessibility to the location, concealment locations (height of the ceiling, type of tile, tile, camouflage) and any that might affect your setup or increase the odds to catch the subject in the act.”]
Source: https://www.csoonline.com/article/2125274/covert-investigations-3–covert-surveillance-setup.html