Solid state lighting devices and methods of manufacturing the same

A method of making a lighting device, said method comprising:

• measuring a first color output of a lighting device while supplying a first string initial current to a first string of solid state lighting devices and a second string initial current to a second string of solid state lighting devices,
• said lighting device comprising at least said first string of solid state lighting devices and said second string of solid state lighting devices,
• adjusting the current supplied to at least one of said first string of solid state lighting devices and said second string of solid state lighting devices such that a first string final current is supplied to said first string of solid state lighting devices and a second string final current is supplied to said second string of solid state lighting devices;
• and
• permanently setting said first string of solid state lighting devices.

A method of tuning a lighting device to provide a desired color output having u′v′ coordinates within a target range on a 1976 CIE Chromaticity Diagram, the lighting device comprising a first string and a second string of solid state lighting devices, both of said first and second strings comprising at least one solid state lighting device which emits light having x, y color coordinates which define a point which is within an area on a 1931 CIE Chromaticity Diagram, and a third string of solid state lighting devices comprising at least one solid state lighting device, the method comprising:

• (1) measuring a color output of the lighting device while supplying a first string initial current to said first string of solid state lighting devices, a second string initial current to said second string of solid state lighting devices and a third string initial current to said third string of solid state lighting devices;
• (2) comparing the color output to said target range;
• (3) adjusting the current supplied to at least one of the first string of solid state light emitters, the second string of solid state light emitters and the third string of solid state light emitters to bring the color output within said target range, such that a first string final current is supplied to the first string of solid state light emitters, a second string final current is supplied to the second string of solid state light emitters and a third string final current is supplied to the third string of solid state light emitters;
• and
• (4) permanently setting a current supplied to the first string of solid state lighting devices, such that if any line voltage is supplied to the first string of solid state lighting devices, said first string final current will be supplied to the first string of solid state lighting devices, and permanently setting a current supplied to the second string of solid state lighting devices, such that if any line voltage is supplied to the second string of solid state lighting devices, said second string final current will be supplied to the second string of solid state lighting devices.