One thing to consider when deciding on installing surveillance cameras or hidden cameras is whether to go with black and white or color. This will depend on where install the cameras and what you want the cameras to record.
Color is a good option for areas that will be well lit. However, if that be outside, once dusk approaches it will be very difficult to see what the camera has recorded. Or, if inside, should the lighting become dim, or lost all together, again, it will be difficult to see the action recorded. If color is important, there are surveillance cameras that have a feature to switch to black and white and using infrared technology when the lighting becomes dim.
If you opt for black and white, lighting conditions are not going to much to be concerned with. Black and white surveillance or cameras have a low lux, therefore allowing better quality of video in well lit or dim conditions. Some hidden or surveillance cameras may even come with an X-Vision feature, where the camera can see even in almost complete darkness.
Also take into consideration that regular black and white cameras are less expensive than color cameras. Choosing X-Vision or infrared will increase costs for both versions or the hidden or surveillance cameras.