"I HATED THAT MY 2 1-2 GAL. TANK DID NOT COME WITH A LIGHT. SO WAS VERY PLEASED THAT I FINALLY FOUND ONE ON LINE. DOESN'T FIT PERFECTLY ON THE TANK, BUT DOES SERVE ITS PURPOSE BY LIGHTING THE TANK WELL. JUST GLAD TO SEE MY FISH AT NIGHT AS WELL AS DAY. IT'S GREAT!!!"