Seasonal Source C9 SMD LED Replacement Bulb, Purple, 120V. Seasonal Source has upgraded their popular LED C9 replacement bulbs to the new SMD (Surface Mounted Diode) bulb. SMD's are brighter and more vibrant. SMD bulbs use less wattage than the previous version of professional LED C9's, at just 0.58 watts each vs .96 watts. This allows you to do a run in one direction up to 800 feet. Upgrading existing C9 displays and socket bulbs to energy-saving LED technology is easy with our proven LED retrofit bulbs. The E17 C9 base easily screws into your existing C9 sockets. The brilliant, faceted design of our LED bulbs will add a warm welcoming feel to any display. Each bulb is constructed from acrylic plastic, making the bulbs rugged and durable while protecting them from rough weather and temperature changes. Every standard color option is available.