Emissive

It is considered to be removed. Please use Directive instead

specifies weather the material emits light

Emissive[color_RGBColor, intensity_:10]

example

Graphics3D[{
    {Emissive[Red], Sphere[{0,0,2}]}, 
    {White, Sphere[]}
}]

The best looking results can be achieved in a Path-tracing mode of Graphics3D. Emissive materials cannot cast light to other objects in a normal rasterization mode, use artificial light sources such as SpotLight and PointLight...