diff --git a/main/Light.h b/main/Light.h
index 9a37068..5e4dc96 100644
--- a/main/Light.h
+++ b/main/Light.h
@@ -23,10 +23,14 @@ class Light
         }
         const Color & getSpecularColor() const { return m_specular_color; }
 
+        void setShininess(double shininess) { m_shininess = shininess; }
+        double getShininess() const { return m_shininess; }
+
     protected:
         Vector m_position;
         Color m_diffuse_color;
         Color m_specular_color;
+        double m_shininess;
 };
 
 #endif
diff --git a/main/Lighting.cc b/main/Lighting.cc
new file mode 100644
index 0000000..e15841c
--- /dev/null
+++ b/main/Lighting.cc
@@ -0,0 +1,19 @@
+
+#include "Lighting.h"
+
+Color Lighting::computePhong(const Material & material,
+                             const std::vector<Light *> & lights,
+                             const Ray & viewRay,
+                             const Vector & surfacePoint,
+                             const Vector & surfaceNormal,
+                             const Color & ambientLight)
+{
+    Color result = ambientLight;
+    Vector V = -viewRay.getDirection();
+    for (std::vector<Light *>::const_iterator it = lights.begin();
+         it != lights.end();
+         it++)
+    {
+    }
+    return result;
+}
diff --git a/main/Lighting.h b/main/Lighting.h
new file mode 100644
index 0000000..7201006
--- /dev/null
+++ b/main/Lighting.h
@@ -0,0 +1,25 @@
+
+#ifndef LIGHTING_H
+#define LIGHTING_H LIGHTING_H
+
+#include "Light.h"
+#include "Material.h"
+#include "util/Ray.h"
+#include "util/Color.h"
+#include <vector>
+
+class Lighting
+{
+    public:
+        static Color computePhong(const Material & material,
+                                  const std::vector<Light *> & lights,
+                                  const Ray & viewRay,
+                                  const Vector & surfacePoint,
+                                  const Vector & surfaceNormal,
+                                  const Color & ambientLight);
+
+    protected:
+};
+
+#endif
+
diff --git a/util/Vector.cc b/util/Vector.cc
index c19591d..bbdde16 100644
--- a/util/Vector.cc
+++ b/util/Vector.cc
@@ -26,6 +26,15 @@ Vector & Vector::normalize()
     return *this;
 }
 
+Vector Vector::operator-() const
+{
+    Vector result;
+    result[0] = -m_array[0];
+    result[1] = -m_array[1];
+    result[2] = -m_array[2];
+    return result;
+}
+
 double Vector::mag() const
 {
     return sqrt(m_array[0] * m_array[0]
diff --git a/util/Vector.h b/util/Vector.h
index 6078ef1..cd14835 100644
--- a/util/Vector.h
+++ b/util/Vector.h
@@ -11,6 +11,7 @@ class Vector
         Vector(double x, double y, double z);
         double & operator[](int idx) { return m_array[idx]; }
         double operator[](int idx) const { return m_array[idx]; }
+        Vector operator-() const;
         Vector & normalize();
         double mag() const;
         double mag2() const;