WE HAVE 2 VERY OLD AND VERY HEAVY 12" GLASS,17"DIAMETER SOLID BRASS PORT LIGHTS (SOME CALL THEM PORT HOLES;THEY ARE REALLY PORT LIGHTS)..THE GREEN PATINA IS BEING LEFT ON AS THE MAJORITY CONSENSUS SAYS TO LEAVE IT THAT WAY..PLEASE YOURSELF..LEAVE IT OR CLEAN IT..THEY ARE IN GREAT CONDITION..THE GLASS IS NOT FOGGY..THEY OPEN AND CLOSE WITH A VERY GOOD RUBBER SEAL..AGAIN..VERY HEAVY..35-40# EACH??