Provisional working coloured lights

shader/lighting/surface.vert

@@ -2,12 +2,12 @@
 layout (location = 0) in vec3 position;
 layout (std140, binding = 0) uniform TheMat { mat4 theMat; } ;
 uniform vec3 lightPos;
-uniform vec2 radLum;
+uniform vec4 lumRad;
 out vec3 dField;
-out float lum;
+out vec3 lum;
 void main()
 {
-    dField = (position - lightPos) / radLum.x;
-    lum = radLum.y;
+    dField = (position - lightPos) / lumRad.a;
+    lum = lumRad.rgb;
     gl_Position = theMat * vec4(position,1);
 }