| Company Name | Type | Status |
|---|---|---|
| KAI CHEONG ELECTRIC BULBS FACTORY LIMITED | Private company limited by shares | Live |
| TAI WAH ELECTRIC BULBS MANUFACTORY LIMITED | Private company limited by shares | Live |
| Kee Tat Electric Bulbs Manufactory Limited | Private company limited by shares | Dissolved |
| SUNSHINE ELECTRIC BULBS FACTORY LIMITED | Private company limited by shares | Dissolved |
| THINK BULBS LIMITED | Private company limited by shares | Dissolved |