Blue Light Source shines blue and illuminates brighter than the white, and penetrates through smoke/fog machines better than any other light source in the world. The blue light source is more ideal for monochrome logos, and colors in the blue-green spectrum. (We can also add bright red words and graphics to the blue light source by adding specialty vinyl)
White Light Source shines white and allows all colors to illuminate in their true hue. This is ideal for graphics with multiple colors.