A method of roll-to-roll manufacturing a circuit for a flexible light engine, comprising: providing an electrically insulating, flexible lower laminate sheet from a first roll; providing an electrically insulating, flexible upper laminate sheet from a second roll and perforating the upper laminate sheet thereby forming a plurality of perforations arranged in a single row; forming electrically conductive first and second metallic bus bars (20, 22) in a single conductive layer on at least one of the lower and upper laminate sheets (12, 14); forming electrically conductive interconnectors at a plurality of locations on each of the first and second metallic bus bars (20, 22); providing a metallic strip from a third roll; disposing the metallic strip in the single conductive layer on at least one of the lower and upper laminate sheets (12, 14); connecting the metallic strip via the interconnectors to the first metallic bus bar at the plurality of interconnector locations of the first metallic bus bar; connecting the metallic strip via the interconnectors to the second metallic bus bar at the plurality of electrical interconnector locations of the second metallic bus bar; retaining the metallic strip between the lower laminate sheet and the upper laminate sheet by laminating the lower laminate sheet with the upper laminate sheet, whereby the laminating also disposes the first and second metallic bus bars (20, 22) and the interconnectors between the lower laminate sheet and the upper laminate sheet, wherein the perforations of the upper laminate sheet are in register with exposed portions of the metallic strip; perforating the exposed portions of the metallic strip, thereby defining a plurality of metallic conductors, wherein each metallic conductor defines two metallic contacts, one said metallic contact being at each opposing free end of each said metallic conductor, and each metallic conductor extends between adjacent perforations in the perforated upper laminate sheet, the two metallic contacts of each metallic conductor being exposed in register with adjacent perforations in the perforated upper laminate sheet; coupling an LED package within each perforation of the upper laminate sheet to the metallic contacts provided by the exposed portions of the metallic strip, thereby defining a plurality of series LED strings connected in parallel between the first and second metallic bus bars (20, 22); and coiling the flexible light engine onto a fourth roll. providing an electrically insulating, flexible lower laminate sheet from a first roll; providing an electrically insulating, flexible upper laminate sheet from a second roll and perforating the upper laminate sheet thereby forming a plurality of perforations arranged in a single row; forming electrically conductive first and second metallic bus bars (20, 22) in a single conductive layer on at least one of the lower and upper laminate sheets (12, 14); forming electrically conductive interconnectors at a plurality of locations on each of the first and second metallic bus bars (20, 22); providing a metallic strip from a third roll; disposing the metallic strip in the single conductive layer on at least one of the lower and upper laminate sheets (12, 14); connecting the metallic strip via the interconnectors to the first metallic bus bar at the plurality of interconnector locations of the first metallic bus bar; connecting the metallic strip via the interconnectors to the second metallic bus bar at the plurality of electrical interconnector locations of the second metallic bus bar; retaining the metallic strip between the lower laminate sheet and the upper laminate sheet by laminating the lower laminate sheet with the upper laminate sheet, whereby the laminating also disposes the first and second metallic bus bars (20, 22) and the interconnectors between the lower laminate sheet and the upper laminate sheet, wherein the perforations of the upper laminate sheet are in register with exposed portions of the metallic strip; perforating the exposed portions of the metallic strip, thereby defining a plurality of metallic conductors, wherein each metallic conductor defines two metallic contacts, one said metallic contact being at each opposing free end of each said metallic conductor, and each metallic conductor extends between adjacent perforations in the perforated upper laminate sheet, the two metallic contacts of each metallic conductor being exposed in register with adjacent perforations in the perforated upper laminate sheet; coupling an LED package within each perforation of the upper laminate sheet to the metallic contacts provided by the exposed portions of the metallic strip, thereby defining a plurality of series LED strings connected in parallel between the first and second metallic bus bars (20, 22); and coiling the flexible light engine onto a fourth roll.