| 摘要 |
A lighting device includes a plurality of light emitting members and a printed circuit board mounted in the main body and electrically connected to each of the light emitting members. The light emitting members are arranged on the printed circuit board in an annular manner to form at least one annular layer of light emitting members to prevent from incurring a concentration of heat radiation and to prevent from producing a greater heat so as to enhance the brightness and lifetime of the light emitting members.
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