The advantage of black and white cameras, include lower cost, and better low-light performance. Put simply, the higher the resolution, the sharper the picture will appear on the monitor. Resolution is measured in terms of horizontal lines across the screen that create the picture that you see on the monitor. For black and white cameras, standard resolution usually means 380 lines, and high resolution means 580 lines. For color cameras, standard resolution means 330 lines, and high resolution means 460 lines.
Most monitors have more than enough lines of resolution for either color or black and white cameras.
However, most VCRs are limited to 240 lines of resolution in color, and 330 lines of resolution in black and white, unless you buy an S-VHS unit which can record at a higher resolution. Another issue that may help differentiate CCTV cameras is the ability of the camera to produce a picture in low light conditions. Lighting conditions are measured in terms of lux , and cameras that have lower lux ratings can see in less light. Keep in mind when planning for an installation that each camera will require it's own power supply. The power supplies listed in the accessories section of the website are small plug in power supplies that have screw terminals for connection to the camera.