Diameter of Glass: these T9 circline lamps have a glass envelope that measures 9/8in (1-1/8in) in diameter
2 Color Temperatures: color temperature varies with the light bulb selected: warm white (3000K) or cool white (4100K)
Good Rated Life: rated life is 9,000-10,000 hours on average
Large Quantity Discount: If you would like us to quote on a large quantity of 22-watt Circline T9 Fluorescent Light Bulbs, please call us at our toll-free number or use the online Quotation Request for Large Quantities form. We are always happy to provide you with our best large quantity pricing.