Standard Warmers: Standard Scentsy warmers use a specially designed light bulb as the heat source. These warmers feature a recessed area or a separate compartment where the light bulb is placed. As the bulb heats up, it melts the wax and releases the fragrance. Bulb warmers often come with decorative shades or covers that diffuse the light, creating a cozy ambiance while emitting fragrance. Standard Warmers use a 15W, 20W, 25W, or 40W Scentsy Light Bulb