Lighting apparatus

A lighting apparatus comprising:

• a direct current power supply unit;
• a light emitting unit operating in response to a direct current voltage applied from the direct current power supply unit and comprising first light emitting groups having a first correlated color temperature and being turned on at a first turn-on voltage (VB) or above and second light emitting groups having a second correlated color temperature and being turned on at a second turn-on voltage (VA) greater than the first turn-on voltage, the first light emitting groups being connected in parallel with the second light emitting groups;
• and
• a voltage control unit located between the direct current power supply unit and the light emitting unit to control a level of a voltage applied from the direct current power supply unit to the light emitting unit,
• wherein the voltage control unit comprises at least one variable resistor to control the level of the voltage applied to the light emitting unit such that the second light emitting groups emit light or are prevented from emitting light, achieving a desired correlated color temperature according to a preset proportion.