This Korean Industrial Standard specifies incandescent lamps for general lighting service (hereafter, referred to as "lamps" ) for 10 to 200w which is clear(colorless transparent), coated white, coated with white-thin film, and frosted inside.
KS C 7501-1999 history
2019KS C 7501-2019 Incandescent lamps for general lighting service
2003KS C 7501-2003 Incandescent lamps for general lighting service
1999KS C 7501-1999 Incandescent lamps for general lighting service
1994KS C 7501-1994 Incandescent lamps for general lighting service