Wall illumination unit for decorative illumination, comprising - a base module (4, 72, 94) which is intended to be installed in a commercially available device receptacle which is covered by a covering frame, wherein the base module (4, 72, 94) has a connection unit for a mains line, a converter, a control device and a plug-in apparatus (6, 80), and - a lighting module (20, 30, 70, 96) which has at least one LED luminaire (24, 38, 54, 106) for a decorative wall illumination, a plug-in apparatus receptacle (22, 52, 82), an electrical energy store (26, 56) and an activation device (28, 58), a) wherein the plug-in apparatus (6, 80) and the plug-in apparatus receptacle (22, 52, 82) can be mechanically and electrically reversibly connected to one another, so that the lighting module (20, 30, 70, 96) is mechanically held by the base module (4, 72, 94) in the connected state, b) wherein the LED luminaire (24, 38, 54, 106) can be actuated by the mains line by means of the connection unit, c) wherein the control device monitors the state of charge of the electrical energy store (26, 56), d) wherein the lighting module (20, 30, 70, 96) is designed such that it can be removed from the base module (4, 72, 94) and can be used autonomously as a torch, e) wherein the lighting module (20, 30, 70, 96) has a light intensity adjusting means which is electrically connected at least to the LED luminaire (24, 38, 54, 106) and can be adjusted such that, in the event of a cut in the power supply by the mains line, the LED luminaire (24, 38, 54, 106) lights up with a predefined light intensity, and f) wherein the activation device (28, 58) is configured such that, in the event of a cut in the power supply by the mains line, it is activated such that the LED luminaire (24, 38, 54, 106) lights up, wherein the electrical energy store (26, 56) supplies energy to the LED luminaire (24, 38, 54, 106). - a base module (4, 72, 94) which is intended to be installed in a commercially available device receptacle which is covered by a covering frame, wherein the base module (4, 72, 94) has a connection unit for a mains line, a converter, a control device and a plug-in apparatus (6, 80), and - a lighting module (20, 30, 70, 96) which has at least one LED luminaire (24, 38, 54, 106) for a decorative wall illumination, a plug-in apparatus receptacle (22, 52, 82), an electrical energy store (26, 56) and an activation device (28, 58), a) wherein the plug-in apparatus (6, 80) and the plug-in apparatus receptacle (22, 52, 82) can be mechanically and electrically reversibly connected to one another, so that the lighting module (20, 30, 70, 96) is mechanically held by the base module (4, 72, 94) in the connected state, b) wherein the LED luminaire (24, 38, 54, 106) can be actuated by the mains line by means of the connection unit, c) wherein the control device monitors the state of charge of the electrical energy store (26, 56), d) wherein the lighting module (20, 30, 70, 96) is designed such that it can be removed from the base module (4, 72, 94) and can be used autonomously as a torch, e) wherein the lighting module (20, 30, 70, 96) has a light intensity adjusting means which is electrically connected at least to the LED luminaire (24, 38, 54, 106) and can be adjusted such that, in the event of a cut in the power supply by the mains line, the LED luminaire (24, 38, 54, 106) lights up with a predefined light intensity, and f) wherein the activation device (28, 58) is configured such that, in the event of a cut in the power supply by the mains line, it is activated such that the LED luminaire (24, 38, 54, 106) lights up, wherein the electrical energy store (26, 56) supplies energy to the LED luminaire (24, 38, 54, 106). a) wherein the plug-in apparatus (6, 80) and the plug-in apparatus receptacle (22, 52, 82) can be mechanically and electrically reversibly connected to one another, so that the lighting module (20, 30, 70, 96) is mechanically held by the base module (4, 72, 94) in the connected state, b) wherein the LED luminaire (24, 38, 54, 106) can be actuated by the mains line by means of the connection unit, c) wherein the control device monitors the state of charge of the electrical energy store (26, 56), d) wherein the lighting module (20, 30, 70, 96) is designed such that it can be removed from the base module (4, 72, 94) and can be used autonomously as a torch, e) wherein the lighting module (20, 30, 70, 96) has a light intensity adjusting means which is electrically connected at least to the LED luminaire (24, 38, 54, 106) and can be adjusted such that, in the event of a cut in the power supply by the mains line, the LED luminaire (24, 38, 54, 106) lights up with a predefined light intensity, and f) wherein the activation device (28, 58) is configured such that, in the event of a cut in the power supply by the mains line, it is activated such that the LED luminaire (24, 38, 54, 106) lights up, wherein the electrical energy store (26, 56) supplies energy to the LED luminaire (24, 38, 54, 106).