| 摘要 |
An LED replacement lamp comprises LED lighting elements (30) arranged on an elongated member with a first end (20a) and opposite second end (20b). Electrical contacts (24a, 26a; 24b, 26b) are provided at the opposite ends (20a, 20b). An LED driver circuit (32) is arranged to supply electrical power to the LED lighting element (30). The LED driver circuit (32) is electrically connected only to the electrical contacts (24a, 26a) at the first end (20a). In order to provide safe operation with an electromagnetic ballast (18), and to provide safety against misuse, such as operation on an electronic ballast, the electrical contacts (24b, 26b) at the second end (20b) are interconnected by a safety circuit (40, 140). The safety circuit (40, 140) provides a current limitation and an electrical resistance between the contacts (24b, 26b). |
