15 watt EarthBulb LED U-Bend tube is available in 3500K, 4000K and 5000K with 300 degree beam angle. Great light output and perfect for replacement of T8 u-bend fluorescent tubes. This linear tube provides 2200 lumens and has a CRI of 82 and saves over 50% in energy costs. This lamp is engineered for high lumen maintenance over its 50,000 hour rated life. Simply “plug and play” on electronic fluorescent ballasts. Compatible with instant start, rapid start and program start ballast. Also compatible with emergency back-up ballasts.