Scentsy Deluxe warmers use a 25 watt Bulb, and Scentsy Plug in warmers use a 15 watt Bulb. A bulb is included with every warmer purchase. Because of their popularity, replacement bulbs can difficult to find in stores. Your Scentsy Consultant can always assist you in finding replacement bulbs for your Scentsy Warmers or you can order replacement bulbs through my site. Just click "Go Shopping".