Light bulb

A light bulb, comprising:

• a base;
• a plurality of optoelectronic units, each of the plurality of optoelectronic units comprising a side surface, a first semiconductor layer, a second semiconductor layer, and a light-emitting layer formed between the first semiconductor layer and the second semiconductor layer;
• a first bonding pad and a second bonding pad formed on a top side of one of the plurality of optoelectronic units;
• a third bonding pad and a fourth bonding pad formed on a top side of another of the plurality of optoelectronic units;
• a plurality of conductive elements spaced apart from each other, wherein one of the plurality of conductive elements comprises a bottom surface directly connecting the first bonding pad formed on the one of the plurality of optoelectronic units and the third bonding pad formed on the another of the plurality of optoelectronic units without covering the side surfaces of the one and the another of the plurality of optoelectronic units, and a top surface opposite to the bottom surface;
• a transparent structure continuously covering the plurality of optoelectronic units and the plurality of conductive elements without directly contacting the top surfaces of the plurality of conductive elements;
• and
• a light tube configured to accommodate the plurality of optoelectronic units, the plurality of conductive elements, and the transparent structure, and comprising a plurality of openings facing a same direction, the light tube being connected to the base.