A surface on one side of the wiring board is a device forming surface including the plurality of the LED chip groups, an external connecting terminal for leading out electrodes, and {TAIL ~ a wiring pattern} for electrical connection between the LED chip groups and {HEAD ~ the external connecting terminal} 
A surface on one side of the wiring board is a device forming surface including the plurality of the LED chip groups , an external connecting terminal for leading out electrodes , and { TAIL ~ a wiring pattern } for electrical connection between the LED chip groups and { HEAD ~ the external connecting terminal }
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