LAMP AND LIGHTING DEVICE

摘要

This lamp is configured such that LEDs are turned on by means of a lighting circuit unit by utilizing electricity received from a base, and heat generated while the LEDs are on is dissipated by means of a heat sink. The lighting circuit unit is housed inside a case that is attached to one end of the heat sink in the axial direction of the lamp, the LEDs are mounted on the other end of the heat sink in the axial direction of the lamp, and the heat sink has multiple fins that radially extend around the lamp axis in a cross-section orthogonal to the lamp axis. When the cross-section is viewed from the lamp axis direction, the heat sink has a connection path that connects first spaces that are present between adjoining fins with second spaces that are present between adjoining fins located on the opposite side to said adjoining fins across the lamp axis.