Straight tube type light emitting diode lamp

The A straight tube type light emitting diode lamp comprises

• a light emitting diode,
• a translucent cover which transmits light from the light emitting diode and has a curved surface protruding in a direction away from the light emitting diode,
• a first heat sink formed on the light emitting diode side with respect to the translucent cover so as to accommodate the light emitting diode in a closed space integrally formed with the translucent cover,
• a heat conducting substrate provided in the closed space and mounted with the light emitting diode,
• a second heat sink provided in the closed space and supporting the substrate,
• a third heat sink has a first surface having a light reflecting. characteristic on the light emitting diode side so as to direct the light from the light emitting diode to the translucent cover and transmits heat from the second heat sink to the first heat sink in the closed space,
• a third heat sink provided a first surface extending from the second heat sink toward the translucent cover, and
• a second heat sink member which is provided at opposite the translucent cover with a gap between the curved surface of the translucent cover, and extends from the vicinity of an end portion on the side opposite second heat sink of the first heat sink member to couple the first heat sink,
• wherein the light reflected at the inner surface of the translucent cover in the light from the light emitting diodes is reflected on the second surface having the light reflection characteristic opposite the translucent cover of the second heat sink member and the reflected light is passed through the translucent cover.