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** Light.h **

#include <windows.h>	// Header File For The Windows Library
#include <stdio.h>		// Header File For Standard Input/Output
#include <gl\gl.h>		// Header File For The OpenGL32 Library
#include <gl\glu.h>		// Header File For The GLu32 Library
#include <gl\glaux.h>	// Header File For The GLaux Library

class Light {
public:
	Light();
	~Light();
	void switchLight(BOOL);
	void init(void);
private:
	BOOL light;					// Lighting ON / OFF
	BOOL lp;						// L Pressed?
	GLfloat LightAmbient[4];
	GLfloat LightDiffuse[4];
	GLfloat LightPosition[4];
};




** Light.cpp **

#include "Light.h"

Light::Light() {
	LightAmbient = { 0.5f, 0.5f, 0.5f, 1.0f };
	LightDiffuse = { 1.0f, 1.0f, 1.0f, 1.0f };
	LightPosition = { 0.0f, 1.0f, 2.0f, 1.0f };
	glLightfv(GL_LIGHT1, GL_AMBIENT, LightAmbient);			// Setup The Ambient Light
	glLightfv(GL_LIGHT1, GL_DIFFUSE, LightDiffuse);			// Setup The Diffuse Light
	glLightfv(GL_LIGHT1, GL_POSITION,LightPosition);		// Position The Light
	glEnable(GL_LIGHT1);																// Enable Light One
}

Light::~Light() {
}

void Light::switchLight(BOOL lp) {
	if (!Light::lp && lp)	{
		lp=TRUE;
		light=!light;
		if (!light) {
			glDisable(GL_LIGHTING);
		}
		else {
			glEnable(GL_LIGHTING);
		}
	}
	Light::lp = lp;
}