- Havit Information Co., Ltd.
- Keronite,Optical Pick-up Componemt,IP Cut Off Filer,ECO Plating,Glass Lens,EL Lamp.
- Address:59-3,Jang-dong ,Yuseong-gu
- Doo Young Electronics Co.,Ltd.
- DY-H.I.D.ballast,EL Lamp,DY-T4 compact fluorescent ballast-programmed start,DY-H.I.D.ballast(High wattage),DY-T5/T5HO fluorescent ballast,DY-Twin tube fluorescent ballast,DY-T8 fluorescent ballast.
- Address:3rd. Nambu Bldg.,Yeoksam-dong ,Gangnam-gu
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