THE STUDENT PILOT AND FLIGHT INSTRUCTOR WERE LANDING AT NIGHT ON A RUNWAY WHICH WAS 150 FEET WIDE, OF WHICH 95 FEET WERE PLOWED OF SNOW. THEY HAD DEPARTED THE SAME AIRPORT EARLIER THAT DAY. THE RUNWAY LIGHTS WERE ILLUMINATED, BUT WERE LOCATED OUTSIDE THE SNOW COVERED PART OF THE RUNWAY. THE STUDENT ALIGNED THE AIRPLANE WITH THE SNOWED COVERED SECTION. THE INSTRUCTOR CAUTIONED THE STUDENT ABOUT THIS ALIGNMENT DURING THE APPROACH, BUT DID NOT TAKE CORRECTIVE ACTION. THE AIRPLANE COLLIDED WITH THE SNOWBANK, SHEARED THE LANDING GEARS AND BUCKLED THE FUSELAGE.