A lighting device, comprising: a plurality of solid state light sources, comprising a first solid state light source having a first color point on the 1931 CIE Chromaticity Diagram, a second solid state light source having a second color point on the 1931 CIE Chromaticity Diagram, and a third solid state light source having a third color point on the 1931 CIE Chromaticity Diagram. a control circuit connected to the plurality of solid state light sources and configured to control an amount of current through each solid state light source in the plurality of solid state light sources to produce a light output for the lighting device; and a memory system connected to the control circuit, wherein the memory system includes, for a range of correlated color temperatures: a first set of data comprising a first plurality of pairs of x-axis coordinates and corresponding y-axis coordinates on the 1931 CIE Chromaticity Diagram, wherein each pair in the first plurality of pairs includes a corresponding luminous flux of said light output and its associated dimming level, wherein each corresponding luminous flux relates to a particular correlated color temperature over a first portion of the range; and a second set of data comprising a second plurality of pairs of x-axis coordinates and corresponding y-axis coordinates on the 1931 CIE Chromaticity Diagram, wherein each pair in the second plurality of pairs includes a corresponding luminous flux of said light output and its associated dimming level, wherein each corresponding luminous flux relates to a particular correlated color temperature over a second portion of the range; wherein the first plurality of pairs for the first portion of the range is determined by taking pairs of x-coordinates and corresponding y-coordinates from a black body curve for a first set of correlated color temperatures within the first portion of the range, and wherein the second plurality of pairs for a second set of correlated color temperatures within the second portion of the range is determined by taking pairs of x-coordinates and corresponding y-coordinates from a line that connects a first end point and a second end point, wherein the first end point is on the black body curve wherein the control circuit is configured to locate within the first set of data and the second set of data in the memory system the pair of x-axis coordinates and corresponding y-axis coordinates, corresponding correlated colour temperature and associated luminous flux for the corresponding dim level that is the same as a desired dim level to adjust the light output for the lighting device to a luminous flux corresponding to a desired dimming level, characterised in that the second end point is one of the first color point, the second color point, and the third color point on the 1931 CIE Chromaticity Diagram. a plurality of solid state light sources, comprising a first solid state light source having a first color point on the 1931 CIE Chromaticity Diagram, a second solid state light source having a second color point on the 1931 CIE Chromaticity Diagram, and a third solid state light source having a third color point on the 1931 CIE Chromaticity Diagram. a control circuit connected to the plurality of solid state light sources and configured to control an amount of current through each solid state light source in the plurality of solid state light sources to produce a light output for the lighting device; and a memory system connected to the control circuit, wherein the memory system includes, for a range of correlated color temperatures: a first set of data comprising a first plurality of pairs of x-axis coordinates and corresponding y-axis coordinates on the 1931 CIE Chromaticity Diagram, wherein each pair in the first plurality of pairs includes a corresponding luminous flux of said light output and its associated dimming level, wherein each corresponding luminous flux relates to a particular correlated color temperature over a first portion of the range; and a second set of data comprising a second plurality of pairs of x-axis coordinates and corresponding y-axis coordinates on the 1931 CIE Chromaticity Diagram, wherein each pair in the second plurality of pairs includes a corresponding luminous flux of said light output and its associated dimming level, wherein each corresponding luminous flux relates to a particular correlated color temperature over a second portion of the range; a first set of data comprising a first plurality of pairs of x-axis coordinates and corresponding y-axis coordinates on the 1931 CIE Chromaticity Diagram, wherein each pair in the first plurality of pairs includes a corresponding luminous flux of said light output and its associated dimming level, wherein each corresponding luminous flux relates to a particular correlated color temperature over a first portion of the range; and a second set of data comprising a second plurality of pairs of x-axis coordinates and corresponding y-axis coordinates on the 1931 CIE Chromaticity Diagram, wherein each pair in the second plurality of pairs includes a corresponding luminous flux of said light output and its associated dimming level, wherein each corresponding luminous flux relates to a particular correlated color temperature over a second portion of the range;