| 摘要 |
An LED lamp includes a heat dissipator, a module substrate on which an LED chip is mounted and fixed to one end of the dissipater, a lighting circuit supplying electric power to the LED chip, and a light guide fixed to the dissipator so that a base of the light guide is located opposite the LED chip. Light emitted from the LED chip is incident on the light guide through its base, the incident light radiating out of a surface of the light guide to be diffused around the light guide. The lamp further includes a heat-conducting column projecting from the one end of the dissipator. The column has a distal end on which the substrate is disposed. The substrate and at least an outer periphery of the column are covered by the light guide. The outer periphery is located near the column surface on which the substrate is disposed.
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