A lighting device , preferably for outdoor environments, which extends predominantly along a main axis (X-X) comprising: - a support stem extending between a first base end , and a second head end ; - a lighting cap comprising: i) a bell having a housing accessible through an opening and laterally defined by a side wall , wherein the second end is housed in said housing through said opening ; ii) a lighting element housed at least partially in the bell , electrically connected to the electrical transmission grid preferably through the stem , comprising a light source ; iii) a central group supporting the lighting element and suitable to fasten the stem to the bell , wherein the central group comprises a first portion , a second portion and an engagement element , arranged therebetween, wherein the central group is configurable in a disengaged configuration, wherein the first portion and the second portion are axially separated from each other and the engagement element is radially disengaged from the bell , and in an engaged configuration, characterized in that the first portion and the second portion are axially brought together in such a way as to perform an action on the engagement element which in turn performs a radial action on the side wall of the bell . - a support stem extending between a first base end , and a second head end ; - a lighting cap comprising: i) a bell having a housing accessible through an opening and laterally defined by a side wall , wherein the second end is housed in said housing through said opening ; ii) a lighting element housed at least partially in the bell , electrically connected to the electrical transmission grid preferably through the stem , comprising a light source ; iii) a central group supporting the lighting element and suitable to fasten the stem to the bell , wherein the central group comprises a first portion , a second portion and an engagement element , arranged therebetween, wherein the central group is configurable in a disengaged configuration, wherein the first portion and the second portion are axially separated from each other and the engagement element is radially disengaged from the bell , and in an engaged configuration, characterized in that the first portion and the second portion are axially brought together in such a way as to perform an action on the engagement element which in turn performs a radial action on the side wall of the bell . i) a bell having a housing accessible through an opening and laterally defined by a side wall , wherein the second end is housed in said housing through said opening ; ii) a lighting element housed at least partially in the bell , electrically connected to the electrical transmission grid preferably through the stem , comprising a light source ; iii) a central group supporting the lighting element and suitable to fasten the stem to the bell , wherein the central group comprises a first portion , a second portion and an engagement element , arranged therebetween, wherein the central group is configurable in a disengaged configuration, wherein the first portion and the second portion are axially separated from each other and the engagement element is radially disengaged from the bell , and in an engaged configuration, characterized in that the first portion and the second portion are axially brought together in such a way as to perform an action on the engagement element which in turn performs a radial action on the side wall of the bell . <EOS>