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how to independently light up a 4" model street lamp? Answered

light-up model street lamp, 4" tall, 14v.i need to be able to light it up without a model train power converter. 

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Some model suppliers stock 'grain of rice' bulbs, and smaller, specifically for this purpose, although I'm unsure as to the exact voltage requirements.

What kind of bulb does it have ? Replace it with an LED, and you can power it with a coin cell.