Lee Display's Classic C-9 Light Bulbs sold by the box! C-9 Clear Twinkling, Flashing, Blinking Christmas Light Bulbs. Replace your old bulbs with a set of brand new Candelabra Lights Incandescent Light Bulbs for Indoor and Outdoor Waterproof and Weather-Resistant Base Size: E17 Brass Base - Screw-In Replaceable Bulbs Bulb Type: Candelabra Style C-9 UL Listed for over 20,000 Hours of Lighting - Extra-long-lasting bulbs Bulb Specs: C-9 (E17) brass base sockets, C9 - 2in long X 1.125in diameter, Screw-In Replaceable, Incandescent Lighting - Warm Glowing Bulbs 7-Watt, 120 Volt Rated over 10,000 hours Indoor/Outdoor - Water-Resistant & Weather-Resistant What's the difference between Twinkle or Steady? Twinkling bulbs have a filament inside the bulb that when heated up by the socket, breaks apart and causes the illusion of a blinking/flashing/twinkling light bulb. Steady Bulbs stay on continuously while plugged in. No flashing on and off. C-9 Clear Twinkling, Flashing, Blinking Christmas Light Bulbs. Replace your old bulbs with a set of brand new Candelabra Lights. What's the difference between Twinkle or Steady? Twinkling bulbs have a filament inside the bulb that when heated up by the socket, breaks apart and causes the illusion of a blinking/flashing/twinkling light bulb. Steady Bulbs stay on continuously while plugged in. No flashing on and off. Bulb Specs: C-9 (E17) brass base sockets. For more information regarding the difference in size: C7 - 1.5in long X .825in diameter C9 - 2in long X 1.125in diameter Screw-In Replaceable 25 Light Bulbs per order Transparent colors - Glass bulbs are clear, no color added Candelabra Shaped - They look like sparkling candles in the night! Incandescent Lighting - Warm Glowing Bulbs 7-Watt, 120 Volt Rated over 10,000 hours Indoor/Outdoor - Water-Resistant & Weather-Resistant All bulbs are checked prior to shipment in good working condition. C7 Orders shipped in a padded envelope with cords included. For orders of C9 or 2 or more C7, orders shipped in cardboard box 8X8X8in. Match your any color of the Holiday Season!