A white light source system comprising: a light emitter including: - a substrate; - a first light emitting diode module disposed on the substrate, being configured to emit a first white light with a first correlated color temperature; - a second light emitting diode module disposed on the substrate, being configured to emit second white light with a second correlated color temperature; - a third light emitting diode module disposed on the substrate, being configured to emit a third white light with a third correlated color temperature; - a fourth light diode emitting module disposed on the substrate, being configured to emit a fourth white light with a fourth correlated color temperature; and a controller configured to control each emission intensity of the white light from the first to the fourth light emitting diode module (8, 9, 10, 11), wherein each of the first to the fourth light emitting diode modules (8, 9, 10, 11) comprises a light emitting diode chip configured to emit a primary light and a phosphor layer covering the light emitting diode chip and is configured to convert the primary light to white light, wherein the controller includes a microprocessor, a memory, and a data input/output unit, wherein the memory stores a plurality of data indicating emission spectra of sunlight observed in a plurality of major regions on the earth, and a plurality of data indicating correlated color temperatures thereof, each plurality of data being classified on the basis of latitude and longitude for each unit of date and time, wherein a system user can select data from the stored data in the memory by inputting location data and time data to the data input/output unit, and wherein the microprocessor is configured to calculate mixing intensity proportions of the first to the fourth light emitting diode module to reproduce a mixed white light representing sunlight corresponding to the selected location and time data. a light emitter including: - a substrate; - a first light emitting diode module disposed on the substrate, being configured to emit a first white light with a first correlated color temperature; - a second light emitting diode module disposed on the substrate, being configured to emit second white light with a second correlated color temperature; - a third light emitting diode module disposed on the substrate, being configured to emit a third white light with a third correlated color temperature; - a fourth light diode emitting module disposed on the substrate, being configured to emit a fourth white light with a fourth correlated color temperature; and - a substrate; - a first light emitting diode module disposed on the substrate, being configured to emit a first white light with a first correlated color temperature; - a second light emitting diode module disposed on the substrate, being configured to emit second white light with a second correlated color temperature; - a third light emitting diode module disposed on the substrate, being configured to emit a third white light with a third correlated color temperature; - a fourth light diode emitting module disposed on the substrate, being configured to emit a fourth white light with a fourth correlated color temperature; and a controller configured to control each emission intensity of the white light from the first to the fourth light emitting diode module (8, 9, 10, 11), wherein each of the first to the fourth light emitting diode modules (8, 9, 10, 11) comprises a light emitting diode chip configured to emit a primary light and a phosphor layer covering the light emitting diode chip and is configured to convert the primary light to white light, wherein the controller includes a microprocessor, a memory, and a data input/output unit, wherein the memory stores a plurality of data indicating emission spectra of sunlight observed in a plurality of major regions on the earth, and a plurality of data indicating correlated color temperatures thereof, each plurality of data being classified on the basis of latitude and longitude for each unit of date and time, wherein a system user can select data from the stored data in the memory by inputting location data and time data to the data input/output unit, and wherein the microprocessor is configured to calculate mixing intensity proportions of the first to the fourth light emitting diode module to reproduce a mixed white light representing sunlight corresponding to the selected location and time data.