Ciata Lighting FC40T5 835 40-Watt Circline Fluorescent T5 Bulb, 800 Series, 3500-Kelvin, 2GX13 Base, 12-Inch Diameter (2 Pack);

Bulbrite Energy Wiser Circline fluorescent bulbs utilize high performance tri-phosphor used in T5 lamps for maximum brightness and color rendering, making them the ideal solution for ceiling fixtures, commercial and industrial applications.