main()

{

int watts;

float lumens;

cout<<" Enter the watts ...";

cin >> watts;

if (watts == 15) lumens = 125;

else if(watts == 25) lumens = 215;

else if(watts == 40) lumens = 500;

else if(watts == 60) lumens = 880;

else if(watts == 75) lumens = 1000;

else if(watts == 100) lumens = 1675;

else lumens = -1;

cout << "\n\n watts = " << watts <<" lumens = "<< lumens;