Designed to deliver cool white light while significantly cutting energy costs, the Ciata T9 Circline Ceiling tube lightbulb is a perfect choice for providing ambient cool white lighting to ceiling fixtures and any commercial space in which it is installed. The electrical specifications consist of a Circline ceiling light bulb with 4-Pin (G10q) base, T9 bulb shape, Lumens per watt (LPW): 52.50, Watt: 20, the Colour temperature of the bulb is 4100K and is non-dimmable. Product specifications and technical details constitute the following Width: 6-inch, Height: 1.13inch, Depth: 6inch, Diameter: 1.125inch, Maximum Overall Length: 6inch. The finish of the bulb is frosted and the color is cool white light. The bulb category is Fluorescent and provides a light output of 1050 LumensProduct Details?Bulb: T9?Lamp Shape: T9 Circline?Lamp Life: 10,000 Hours?Base: 4-Pin (G10q)?Brightness: 1050 Lumens?Watts: 20?Color/Finish: Cool White?Color Temperature: 4100K.?Dimmable: Not Dimmable?CRI: 62?Bulb Type: Fluorescent