Substrate structure for LED lighting

A substrate structure for LED lighting, the structure comprising:

• a first substrate configured to mount a first LED thereon;
• and
• three second substrates coupled to the first substrate such that the three second substrates are perpendicular to the first substrate and are arranged at an angular interval of about 120° with respect to each other in a cross sectional view taken in a direction parallel to the first substrate, each of the second substrates being configured to mount a second LED thereon,
• wherein the first substrate is provided with a vent hole for convection of heat between an inside region where the first LED and the second LED are installed and an outside region where the first LED and the second LED are not installed, and the vent hole is a single hole formed at a center of the first substrate.

A substrate structure for LED lighting, the structure comprising:

• a first substrate configured to mount a first LED thereon;
• and
• three second substrates coupled to the first substrate such that the three second substrates are perpendicular to the first substrate and are arranged at an angular interval of about 120° with respect to each other in a cross sectional view taken in a direction parallel to the first substrate, each of the second substrates being configured to mount a second LED thereon, and
• a luminance sensor provided on a second surface of the first substrate, which is opposite to a first surface on which the first LED is installed, or provided at a position spaced from the second surface, and functioning to sense luminance around a lighting device including the first LED and the second LED.