Screw based replaceable bulbs are widely used in hanging chandeliers and wall sconces to achieve a lighted candle look.
a four pack of 12 volt bulbs
Candlflame Screw Base Bulb 4pcs Item #2101 Four-piece set. 12 volt. 65 ma Replacement bulbs for chandeliers and lights that have replaceable bulbs with small screw type base.