Ushio 4-Pin 2G11 Base Ultra-L™ Long Compact Fluorescent Lamps. The Ultra-L™ from USHIO delivers high light output in a compact shape, suitable for smaller luminaires. For example: a 40W Ultra-L™ lamp produces 3150 lumens with a length of only 21.1 inches compared to an F32T8 lamp which produces 3050 lumens with a length of 48 inches. In an effort to reduce maintenance costs, the life rating of these lamps is 12,000 hours. Compared to incandescent lamps, these Ultra-L™ lamps will last 12 to 16 times longer.All of the Ultra-L™ lamps are manufactured using a tri-phosphor coating ensuring that all lamps have the high color rendering properties of 800 series lamps. The Ultra-L™ lamps have a CRI of 82 and are available in 3000K, 3500K and 4100K color temperatures.