LAMP AND ILLUMINATION APPARATUS

摘要

A lamp capable of effectively suppressing increase in the temperature of circuit devices is provided. The lamp (10) includes: an LED module (4) composed of LED chips (4b); a base (2) through which electric power is received; a lighting circuit (7) which includes a circuit device group (71) for generating electric power for causing the LED module (4) to emit light using the electric power received through the base (2); an inner casing (6) which is a tubular portion made of resin for housing the lighting circuit (7); and an outer casing (3) which is a tubular portion for housing the inner casing (6). On the circumferential surface of the inner casing (6), a protrusion (65) is provided which directly abuts the inner circumferential surface of the outer casing (3).