A circuit board arrangement comprising a first circuit board and a second circuit board, each circuit board (B1, B2) comprising: a portion of a circuit; and a first electrical terminal, a second electrical terminal and a third electrical terminal to be electrically connected to a respective first electrical terminal, a second electrical terminal and a third electrical terminal of the other circuit board of the first and the second circuit boards, so as to couple the portions of the circuit of the first and the second circuit boards, wherein the first and second electrical terminals on one of the first and second circuit boards are coupled with each other via the portion of the circuit on the other circuit boarc characterised in that at least one circuit board of the first and the second circuit boards further comprising: a voltage suppression element (TSS1, TSS2) connected across the first and second electrical terminals of the at least one circuit board, said voltage suppression element (TSS1, TSS2) is adapted to become conductive when a voltage thereacross reaches a threshold; wherein the portion of the circuit comprises at least one LED, and said at least one LED on the first circuit board and said at least one LED on the second circuit board are adapted to be connected in series between a first interconnection (LED+) of the first electrical terminal of the first circuit board and the second circuit board and a second interconnection (LED-) of the second electrical terminal of the first circuit board and the second circuit board, wherein the first interconnection (LED+) of the first electrical terminals and the second interconnection (LED-) of the second electrical terminals are in series connection with each other via a third interconnection of the third electrical terminals and the LEDs of the first and second circuit boards, and a LED current is adapted to flow from the first interconnection (LED+), through the at least one LED on the first circuit board, through the third interconnection, through the at least one LED on the second circuit board, and to the second interconnection (LED-). a portion of a circuit; and a first electrical terminal, a second electrical terminal and a third electrical terminal to be electrically connected to a respective first electrical terminal, a second electrical terminal and a third electrical terminal of the other circuit board of the first and the second circuit boards, so as to couple the portions of the circuit of the first and the second circuit boards, wherein the first and second electrical terminals on one of the first and second circuit boards are coupled with each other via the portion of the circuit on the other circuit boarc characterised in that at least one circuit board of the first and the second circuit boards further comprising: a voltage suppression element (TSS1, TSS2) connected across the first and second electrical terminals of the at least one circuit board, said voltage suppression element (TSS1, TSS2) is adapted to become conductive when a voltage thereacross reaches a threshold; wherein the portion of the circuit comprises at least one LED, and said at least one LED on the first circuit board and said at least one LED on the second circuit board are adapted to be connected in series between a first interconnection (LED+) of the first electrical terminal of the first circuit board and the second circuit board and a second interconnection (LED-) of the second electrical terminal of the first circuit board and the second circuit board, wherein the first interconnection (LED+) of the first electrical terminals and the second interconnection (LED-) of the second electrical terminals are in series connection with each other via a third interconnection of the third electrical terminals and the LEDs of the first and second circuit boards, and a LED current is adapted to flow from the first interconnection (LED+), through the at least one LED on the first circuit board, through the third interconnection, through the at least one LED on the second circuit board, and to the second interconnection (LED-). a voltage suppression element (TSS1, TSS2) connected across the first and second electrical terminals of the at least one circuit board, said voltage suppression element (TSS1, TSS2) is adapted to become conductive when a voltage thereacross reaches a threshold; wherein the portion of the circuit comprises at least one LED, and said at least one LED on the first circuit board and said at least one LED on the second circuit board are adapted to be connected in series between a first interconnection (LED+) of the first electrical terminal of the first circuit board and the second circuit board and a second interconnection (LED-) of the second electrical terminal of the first circuit board and the second circuit board, wherein the first interconnection (LED+) of the first electrical terminals and the second interconnection (LED-) of the second electrical terminals are in series connection with each other via a third interconnection of the third electrical terminals and the LEDs of the first and second circuit boards, and a LED current is adapted to flow from the first interconnection (LED+), through the at least one LED on the first circuit board, through the third interconnection, through the at least one LED on the second circuit board, and to the second interconnection (LED-).