Abstract: A surge protective device includes a first electrode terminal and a second electrode terminal; n gap units, connected in series between the first electrode terminal and the second electrode terminal sequentially, where a common terminal is formed between adjacent gap units; k first trigger circuits, the k first trigger circuits each include a first terminal connected to one of the common terminals, and a second terminal connected to the second electrode terminal; and m second trigger circuits, the m second trigger circuits each include a first terminal connected to one of the common terminals, and a second terminal connected to the first electrode terminal, where any one of the common terminals is connected only to either the first terminal of one of the first trigger circuits or the first terminal of one of the second trigger circuits.

Abstract: A heat dissipation structure (2) for a lighting device (1) is provided. The heat dissipation structure comprises at least two separate heat sinks (20, 10) for a light source (3) and a driver (7) for the light source, respectively. Each heat sink comprises fins (11, 21, 22) and a wall arrangement (15, 25). The at least two separate heat sinks are disposed along an axial direction of the lighting device. The fins of the at least two separate heat sinks are enclosed by the wall arrangements to form a chimney structure (30) arranged along (such as substantially parallel with) the axial direction of the lighting device. Further, the chimney structure comprises at least two sub-chimney structures (31, 32) arranged fluidly in parallel. The sub-chimney structures provide (accelerate) two air flows in parallel within the chimney structure, whereby cool air flows through the two sub-chimney structures simultaneously, which reduces heat concatenation.

Abstract: A heat dissipation structure (2) for a lighting device (1) is provided. The heat dissipation structure comprises at least two separate heat sinks (20, 10) for a light source (3) and a driver (7) for the light source, respectively. Each heat sink comprises fins (11, 21, 22) and a wall arrangement (15, 25). The at least two separate heat sinks are disposed along an axial direction of the lighting device. The fins of the at least two separate heat sinks are enclosed by the wall arrangements to form a chimney structure (30) arranged along (such as substantially parallel with) the axial direction of the lighting device. Further, the chimney structure comprises at least two sub-chimney structures (31, 32) arranged fluidly in parallel. The sub-chimney structures provide (accelerate) two air flows in parallel within the chimney structure, whereby cool air flows through the two sub-chimney structures simultaneously, which reduces heat concatenation.

Abstract: A heat dissipation structure (2) for a lighting device (1), comprising: at least two separate heat sinks (20, 10) for a light source (3) and a driver (7) for the light source (1), respectively, each heat sink (20, 10) comprising fins (21, 22, 11) and a wall arrangement (15, 25), wherein said at least two separate heat sinks (20, 10) are disposed along an axial direction of the lighting device (1), wherein the fins (21, 22, 11) of said at least two separate heat sinks (20, 10) are enclosed by the wall arrangements (15, 25) to form a chimney structure (30) arranged along said axial direction of the lighting device (1), and wherein the chimney structure (30) comprises at least two sub-chimney structures (31, 32) arranged fluidly in parallel to provide two air flows simultaneously, which reduces heat concatenation.

Abstract: Disclosed is a lighting device (1) comprising a housing (80), an air inlet (22) and an air outlet (24); a support structure (30) in said housing extending in between said air inlet and said air outlet, said support structure including a section (32) carrying at least one solid state lighting element (10); a conduit (20) from said air inlet to said air outlet such that the conduit extends over the support structure; and a fan (40) mounted in said conduit, wherein the fan is located closer to the air inlet than to the air outlet. A luminaire including such a lighting device is also disclosed.

Abstract: Disclosed is a lighting device (1) comprising a housing (80), an air inlet (22) and an air outlet (24); a support structure (30) in said housing extending in between said air inlet and said air outlet, said support structure including a section (32) carrying at least one solid state lighting element (10); a conduit (20) from said air inlet to said air outlet such that the conduit extends over the support structure; and a fan (40) mounted in said conduit, wherein the fan is located closer to the air inlet than to the air outlet. A luminaire including such a lighting device is also disclosed.

Abstract: A heat dissipation structure (2) for a lighting device (1), comprising: at least two separate heat sinks (20, 10) for a light source (3) and a driver (7) for the light source (1), respectively, each heat sink (20, 10) comprising fins (21, 22, 11) and a wall arrangement (15, 25), wherein said at least two separate heat sinks (20, 10) are disposed along an axial direction of the lighting device (1), wherein the fins (21, 22, 11) of said at least two separate heat sinks (20, 10) are enclosed by the wall arrangements (15, 25) to form a chimney structure (30) arranged along said axial direction of the lighting device (1), and wherein the chimney structure (30) comprises at least two sub-chimney structures (31, 32) arranged fluidly in parallel to provide two air flows simultaneously, which reduces heat concatenation.