LIONEL DIMPLE BULB 461 FOR 394 ROTATING BEACON. YOU WILL RECEIVE 4 BULBS FOR THIS COST.  ADDITIONAL BULBS CAN BE SHIPPED AT FREE COMBINED SHIPPING WHEN ALL ORDERED & PAID FOR TOGETHER.  JUST CHANGE THE QUANTITY IN THE BOX TO THE NUMBER YOU WISH TO PURCHASE BEFORE CLICKING BUY IT NOW OR ADDING TO THE SHOPPING CART.