A waterproofing structure for a connector includes a first housing having a first terminal reception chamber for receiving a terminal and a second housing having a second terminal reception chamber for receiving a terminal. An opening end of the first terminal reception chamber is opposed to an opening end of the second terminal reception chamber, so that a gap with which circumferential edges of the opening ends are opposed to each other is configured to be sealed. An annular member made of resin is provided at the circumferential edge of the opening end of the first terminal reception chamber, the annular member having an inner circumferential surface widened toward the second housing. The circumferential edge of the opening end of the second terminal reception chamber abuts against the inner circumferential surface of the annular member.

A tubular LED lighting device (10) comprising an LED, a driver (18) for driving the LED, and an electrical connector (14). The lighting device further comprises a thermally triggered switch (16) for prevention of overheating of the electrical connector. The thermally triggered switch is connected in series between the electrical connector and the driver, and the thermally triggered switch is configured to interrupt current in the event of the temperature of the electrical connector meeting a triggering condition. If a significant degree of arcing occurs the electrical connector will heat up such that the triggering condition will be met and the current flow between the electrical connector and the driver will be interrupted. There is also provided a luminaire (20) comprising the tubular LED lighting device.

A waterproofing structure for a connector includes a first housing having a first terminal reception chamber for receiving a terminal and a second housing having a second terminal reception chamber for receiving a terminal. An opening end of the first terminal reception chamber is opposed to an opening end of the second terminal reception chamber, so that a gap with which circumferential edges of the opening ends are opposed to each other is configured to be sealed. An annular member made of resin is provided at the circumferential edge of the opening end of the first terminal reception chamber, the annular member having an inner circumferential surface widened toward the second housing. The circumferential edge of the opening end of the second terminal reception chamber abuts against the inner circumferential surface of the annular member.