Lighting fixture comprising a plurality of light sources positioned at the front of a support plate, said light sources each having at least a first and a second electrical terminals, wherein said support plate comprises: - at the front, a first insulating layer, - an upper conductive layer, - a lower conductive layer, and - an intermediate insulating layer electrically insulating said upper and lower layers; said upper conductive layer being sandwiched between the intermediate insulating layer and the first insulating layer, wherein said first and second electrical terminals are electrically connected respectively to the upper and lower layer and are electrically insulated respectively from the lower and upper layers, or conversely, wherein said support plate includes, for each light source, a) a first hole traversing at least partially said upper layer and said first insulating layer before opening onto the front; b) a second hole traversing at least partially said lower layer, said insulating layer, said upper layer and said first insulating layer before opening onto the front; and c) a third, so-called blind, hole, traversing at least said upper layer and at least partially said insulating layer before opening onto the front, said blind hole being substantially centred on said second hole and having a greater diameter than said second hole so as to electrically insulate said upper layer and said second or first electrical terminal electrically connected to the lower layer, which comprises: a first electrical bridge (19a, 19b) electrically insulated and housed inside said first hole, electrically connecting said upper layer to the front to establish at the front an electrical contact point (21a, 22a) between said first or second electrical terminal of said light source and said upper layer; and a second electrical bridge (19a, 19b) electrically insulated and housed inside said second hole, electrically connecting said lower layer to the front to establish at the front an electrical contact point (22a, 21a) between said second or first electrical terminal of said light source and said lower layer. wherein said support plate comprises: - at the front, a first insulating layer, - an upper conductive layer, - a lower conductive layer, and - an intermediate insulating layer electrically insulating said upper and lower layers; - at the front, a first insulating layer, - an upper conductive layer, - a lower conductive layer, and - an intermediate insulating layer electrically insulating said upper and lower layers; said upper conductive layer being sandwiched between the intermediate insulating layer and the first insulating layer, wherein said first and second electrical terminals are electrically connected respectively to the upper and lower layer and are electrically insulated respectively from the lower and upper layers, or conversely, wherein said support plate includes, for each light source, a) a first hole traversing at least partially said upper layer and said first insulating layer before opening onto the front; b) a second hole traversing at least partially said lower layer, said insulating layer, said upper layer and said first insulating layer before opening onto the front; and c) a third, so-called blind, hole, traversing at least said upper layer and at least partially said insulating layer before opening onto the front, said blind hole being substantially centred on said second hole and having a greater diameter than said second hole so as to electrically insulate said upper layer and said second or first electrical terminal electrically connected to the lower layer, a) a first hole traversing at least partially said upper layer and said first insulating layer before opening onto the front; b) a second hole traversing at least partially said lower layer, said insulating layer, said upper layer and said first insulating layer before opening onto the front; and c) a third, so-called blind, hole, traversing at least said upper layer and at least partially said insulating layer before opening onto the front, said blind hole being substantially centred on said second hole and having a greater diameter than said second hole so as to electrically insulate said upper layer and said second or first electrical terminal electrically connected to the lower layer, which comprises: a first electrical bridge (19a, 19b) electrically insulated and housed inside said first hole, electrically connecting said upper layer to the front to establish at the front an electrical contact point (21a, 22a) between said first or second electrical terminal of said light source and said upper layer; and a second electrical bridge (19a, 19b) electrically insulated and housed inside said second hole, electrically connecting said lower layer to the front to establish at the front an electrical contact point (22a, 21a) between said second or first electrical terminal of said light source and said lower layer. a first electrical bridge (19a, 19b) electrically insulated and housed inside said first hole, electrically connecting said upper layer to the front to establish at the front an electrical contact point (21a, 22a) between said first or second electrical terminal of said light source and said upper layer; and a second electrical bridge (19a, 19b) electrically insulated and housed inside said second hole, electrically connecting said lower layer to the front to establish at the front an electrical contact point (22a, 21a) between said second or first electrical terminal of said light source and said lower layer.