diff --git a/Includes.hlsli b/Includes.hlsli
index e5002e5..d27c845 100644
--- a/Includes.hlsli
+++ b/Includes.hlsli
@@ -1,6 +1,27 @@
 #ifndef __SHADER_INCLUDES__
 #define __SHADER_INCLUDES__
 
+#define LIGHT_TYPE_DIRECTIONAL	0
+#define LIGHT_TYPE_POINT		1
+#define LIGHT_TYPE_SPOT			2
+
+#define MAX_SPECULAR_EXPONENT 256.0f
+
+struct Light
+{
+	int		Type;
+	float3	Direction;
+
+	float	Range;
+	float3	Position;
+
+	float	Intensity;
+	float3	Color;
+
+	float	SpotFalloff;
+	float3	Padding;
+};
+
 // Struct representing the data we expect to receive from earlier pipeline stages
 // - Should match the output of our corresponding vertex shader
 // - The name of the struct itself is unimportant
diff --git a/Lights.h b/Lights.h
index b3085ed..546f6f6 100644
--- a/Lights.h
+++ b/Lights.h
@@ -1,8 +1,10 @@
 #pragma once
+
+#include <DirectXMath.h>
+
 #define LIGHT_TYPE_DIRECTIONAL	0
 #define LIGHT_TYPE_POINT		1
 #define LIGHT_TYPE_SPOT			2
-#include <DirectXMath.h>
 
 struct Light
 {
diff --git a/SimplePixelShader.hlsl b/SimplePixelShader.hlsl
index a85c019..8a34fb8 100644
--- a/SimplePixelShader.hlsl
+++ b/SimplePixelShader.hlsl
@@ -5,10 +5,11 @@ cbuffer ExternalData : register(b0)
 	float3 cameraPosition;
 	float roughness;
 	float3 ambient;
+	Light directionalLight1;
 }
 
 float4 main(VertexToPixel input) : SV_TARGET
 {
 	input.normal = normalize(input.normal);
-	return float4(input.normal, 1);
+	return float4(directionalLight1.Color, 1);
 }