The construction assembly comprises a basic frame unit and a frame member movably mounted on the basic frame unit one telescopic strut unit including two telescopic members and being connected to both the basic frame unit and the movable frame member and a lighting installation with one light source unit. The light source unit is carried by the one telescopic strut unit. The movable frame member is pivotally mounted on the basic frame unit about a horizontal axis, and is subject to gravity forces.
