@mashable Engineering answer -> white LED, blue paint
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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@mashable congratsssThanks. Twitter will use this to make your timeline better. UndoUndo
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@mashable is it RGB which make white light.Thanks. Twitter will use this to make your timeline better. UndoUndo
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@mashable Inventing LED's for energy efficiency and wasting natural resources and energy to produce something that saves energy.. hmmm -
@bundevski everything has an associated cost@mashable
End of conversation
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