Light-emitting device and lighting system

A light emitting device comprising:

• a conductive semiconductor layer divided into at least two or more light emitting regions;
• a plurality of light emitting structures having rod shapes on the conductive semiconductor layer;
• an electrode layer on the plurality of light emitting structures;
• a second electrode electrically connected to the electrode layer;
• and
• a first electrode electrically connected to the conductive semiconductor layer,
• wherein the light emitting structures included in the light emitting regions of the conductive semiconductor layer have different electric fields and emit light of different wavelength bands when being operated
• wherein each of the light emitting structures includes a rod-shaped first conductivity type semiconductor, an active layer configured to surround the first conductivity type semiconductor and a second conductivity type semiconductor configured to surround the active layer, and
• each of the light emitting structures has at least two or more outer surfaces having different extending directions with respect to an upper surface of the conductive semiconductor layer,
• wherein the active layer is disposed on a top surface and a side surface of the rod-shaped first conductivity type semiconductor, and
• wherein the second conductivity type semiconductor is disposed a top surface and a side surface of the active layer.