Planning to change your Christmas lights display from incandescent to LED? These replacement bulbs work in all standard Christmas lights cords made with parallel/lamp cord style wiring. Note that parallel wired cords stay on if one of the bulbs is unscrewed from its socket. These bulbs are sold in bags of 25 and the prices listed are per bulb. Install them in either modern Christmas light cords that are in good condition or be sure to purchase new C9 cords.
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