Tubular lighting device assembly

A method of forming a light engine assembly by soldering a flexible carrier strip to a rigid printed circuit board, comprising:

• providing a flexible carrier strip comprising an elongate major surface and a further elongate major surface opposite the elongate major surface, the elongate major surface carrying a plurality of solid state lighting elements on a first portion of the flexible carrier strip, and carrying a plurality of electrically conductive contacts each acting as a terminal for the plurality of solid state lighting elements in adjacent terminal regions at one end of the flexible carrier strip, said adjacent terminal regions being separated by a recess and an enhancing portion bridging parallel edges of the adjacent terminal regions;
• providing a rigid printed circuit board comprising a first major surface onto which a driver circuit for the solid state lighting elements is mounted and a second major surface opposite the first major surface carrying a plurality of spatially separated soldering pads along an edge of the second major surface, each soldering pad corresponding to one electrically conductive contact;
• aligning the flexible carrier strip with the rigid printed circuit board such that the further elongate major surface contacts the second major surface and each electrically conductive contact is aligned with one of the spatially separated soldering pads;
• and
• soldering each electrically conductive contact to the aligned soldering pad by applying a solder portion to the electrically conductive contact and extending said solder portion over the terminal region carrying said electrically conductive contact onto the aligned soldering pad.