| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lamp which efficiently radiates heat generated from LED elements without conducting the heat to electronic components mounted on a lighting circuit board, reversely radiates heat generated by the electronic components mounted on the lighting circuit board without affecting the LED elements, and achieves high luminance and long life.SOLUTION: Heat generated from an electronic component 74 mounted on a lighting circuit board 7 is conducted to a circuit board holder 5 through a heat radiation resin to be radiated from an insulation housing 4 contacting with a taper part 52 of the circuit board holder 5 to outer air. Heat generated by the LED elements 21 mounted on the LED substrate 2 is conducted to a placement surface of a heat radiation member 3 fixedly and tightly attached to the substrate to be radiated from fins of the heat radiation member 3 to the outer air. |
