Ushio 3000282 - UFL-F40T10/5000K - 40 Watt T10 Full Spectrum Fluorescent Light Bulb, 4' Length

At 40 watts and a high lumen output, USHIO's Ultra 5000TM T10 fl uorescent lamps can increase light output up to 15% over T12 lamps, while producing a whiter, more natural daylight color. When used with electronic ballasts, an additional 10%-15% in energy savings may result. The triphosphor coatings allow for exceptional color rendering at 90 CRI making these lamps ideal for paint stores, retail shops, clothing boutiques, hair salons and graphic arts studios or other environments where color rendering is critical. The Ultra 5000TM T10s are manufactured with a cathode guard which prevents end darkening to insure maximum light output throughout the life of the lamp.