I accidentally bought the wrong size, so I've been storing this at home. It's new and unused. The base size is E17. Please make sure this is the correct size for you. NEC 11W compact fluorescent light bulb, E17 base, color temperature 2800K, compact design with a diameter of 38mm. - Brand: NEC - Model Name: EFD15EL/11-E17-C2C - Type: Compact Fluorescent Lamp - Base: E17 - Wattage: 11W - Color Temperature: 2800K - Dimensions: Diameter 38mm Please understand that this item has been stored at home before purchasing. It will be shipped via Yu-packet Plus. Thank you for looking.