Led substrate and light illuminating apparatus with the same

A light emitting diode (LED) substrate, comprising:

• a substrate of a rectangular shape having sides in a first direction and a second direction perpendicular to the first direction;
• a plurality of LED devices placed on a surface of the substrate;
• and
• a plurality of conducting member which electrically connects the plurality of LED devices on the surface of the substrate, and forms 2n circuits independent from each other in the first direction, wherein n is an integer greater than or equal to 1,
• wherein each circuit has a first electrode part on the conducting member connected to one end of the circuit and a second electrode part on the conducting member connected to the other end of the circuit, the first electrode part being electrically connected to outside to receive input of an electric current from the outside, the second electrode part being electrically connected to outside to output an electric current to the outside, and
• the first electrode part and the second electrode part face each other in the second direction, and are alternately placed in the first direction such that the first electrode part and the second electrode part are point-symmetrical with respect to a center of the substrate as a symmetry point.