Light-emitting device each having variable distances between pairs of electrode pads with respect to Zener diodes and lighting apparatus using the same

A light-emitting device, comprising:

• a substrate;
• light-emitting elements arranged on the substrate in a row;
• electrode pad pairs formed on the substrate in one-to-one correspondence to the light-emitting elements, each electrode pad pair including two electrode pads located on the substrate at opposite sides of a corresponding light-emitting element in an arrangement direction of the light-emitting elements;
• Zener diodes provided in one-to-one correspondence to groups each constituted by at least three consecutive sets of light-emitting elements and electrode pad pairs, each Zener diode being located between any two adjacent electrode pads included in different electrode pad pairs;
• and
• a sealing member provided on the substrate to seal the light-emitting elements, the electrode pad pairs, and the Zener diodes, wherein
• in each group,
• a distance between two electrode pads included in an electrode pad pair corresponding to a light-emitting element located closest to the Zener diode is shorter than a distance between two electrode pads included in any other electrode pad pair,
• a distance between two electrode pads included in each electrode pad pair varies between at least two electrode pad pairs other than the electrode pad pair corresponding to the light-emitting element located closest to the Zener diode, and
• a distance between two electrode pads included in each electrode pad pair becomes shorter with decreasing distance to the Zener diode.