A LED light apparatus includes a substrate, LED modules, a driver circuit, a fluorescent layer, a connector and a light passing shell. The LED modules are mounted on the substrate. The fluorescent layer covers the driver circuit and the LED modules. The connector has a first end electrically connecting to the driver circuit. The light passing shell encapsulates the substrate, the plurality of first LED modules, the driver circuit, the first fluorescent layer and at least a part of the connector. The connector has a second end connecting to an external power source.

An elongated lamp tube has an elongated tube shell, two caps, a LED light source, a first power supply circuit, a second power supply circuit and a frequency switch circuit. The elongated lamp tube may be connected to first electrodes of a lamp fixture without a ballast or a lamp fixture with a ballast. The ballast converts an external power of an industrial frequency to a converted power of a working frequency. The frequency switch circuit is connected to the first power supply and the second power supply for blocking one of the first power supply circuit and the second power supply to supply driving current to the LED light source according to an input frequency of a received power.

An elongated lamp tube has an elongated tube shell, two caps, a LED light source, a first power supply circuit, a second power supply circuit and a frequency switch circuit. The elongated lamp tube may be connected to first electrodes of a lamp fixture without a ballast or a lamp fixture with a ballast. The ballast converts an external power of an industrial frequency to a converted power of a working frequency. The frequency switch circuit is connected to the first power supply and the second power supply for blocking one of the first power supply circuit and the second power supply to supply driving current to the LED light source according to an input frequency of a received power.

An LED tube lamp comprises: a glass lamp tube; a light diffusion layer disposed on a surface of the glass lamp tube; an LED light strip, which comprises a fixing portion and an extending portion disposed in the glass lamp tube; a plurality of LED light sources mounted on the fixing portion of the LED light strip; a fixing structure disposed between the fixing portion and the inner circumferential surface the glass lamp tube; a power supply module disposed on the fixing structure and electrically connecting to the LED light strip and two end caps attached to two ends of the glass lamp tube respectively. The fixing structure comprises a first end fixedly connected to the inner circumferential surface of the glass lamp tube and a second end fixedly connected to the fixing portion of the LED light strip and not connected to the extending portion of the LED light strip.

An LED tube lamp comprises: a glass lamp tube; a light diffusion layer disposed on a surface of the glass lamp tube; an LED light strip, which comprises a fixing portion and an extending portion disposed in the glass lamp tube; a plurality of LED light sources mounted on the fixing portion of the LED light strip; a fixing structure disposed between the fixing portion and the inner circumferential surface the glass lamp tube; a power supply module disposed on the fixing structure and electrically connecting to the LED light strip and two end caps attached to two ends of the glass lamp tube respectively. The fixing structure comprises a first end fixedly connected to the inner circumferential surface of the glass lamp tube and a second end fixedly connected to the fixing portion of the LED light strip and not connected to the extending portion of the LED light strip.

AN LED tube apparatus has a tube body with two opposite ends fixed to a first cap and a second cap. AN LED module is placed in the tube body. The LED module has a driver circuit containing an electronic ballast that generates high frequency electric current. The first cap has two first metal pins to be inserted in a first socket end of a light tube bracket. The first metal pin clutches an end of a leading wire. The leading wire has a protective portion breaking off when the first metal pin is applied with a predetermined range of heat generated by the high frequency electric current when the LED tube apparatus is not operated properly.

AN LED tube apparatus has a tube body with two opposite ends fixed to a first cap and a second cap. AN LED module is placed in the tube body. The LED module has a driver circuit containing an electronic ballast that generates high frequency electric current. The first cap has two first metal pins to be inserted in a first socket end of a light tube bracket. The first metal pin clutches an end of a leading wire. The leading wire has a protective portion breaking off when the first metal pin is applied with a predetermined range of heat generated by the high frequency electric current when the LED tube apparatus is not operated properly.

A lighting unit has an input connector which has a first terminal arrangement which connects to a protection circuit to engage a lighting driver in an initial connection of the lighting unit (14) and the lighting driver (12), and a second terminal arrangement which connects to a light source. The second terminal arrangement is adapted to engage the lighting driver later than an engagement of the first terminal arrangement to the light driver. The protection circuit (22) is adapted to operate earlier than an engagement of the light source (20) to the lighting driver (20). The protection circuit prevents current surges from being delivered by the lighting driver at the time of connection of the lighting unit. The protection circuit is only applied temporarily, before direct connection is made between the light source and the lighting driver.

A lighting unit has an input connector which has a first terminal arrangement which connects to a protection circuit to engage a lighting driver in an initial connection of the lighting unit (14) and the lighting driver (12), and a second terminal arrangement which connects to a light source. The second terminal arrangement is adapted to engage the lighting driver later than an engagement of the first terminal arrangement to the light driver. The protection circuit (22) is adapted to operate earlier than an engagement of the light source (20) to the lighting driver (20). The protection circuit prevents current surges from being delivered by the lighting driver at the time of connection of the lighting unit. The protection circuit is only applied temporarily, before direct connection is made between the light source and the lighting driver.

A LED light apparatus includes a substrate, LED modules, a driver circuit, a fluorescent layer, a connector and a light passing shell. The LED modules are mounted on the substrate. The fluorescent layer covers the driver circuit and the LED modules. The connector has a first end electrically connecting to the driver circuit. The light passing shell encapsulates the substrate, the plurality of first LED modules, the driver circuit, the first fluorescent layer and at least a part of the connector. The connector has a second end connecting to an external power source.