15 watt EarthBulb LED linear tube is available in 4000K with 300 degree beam angle. Great light output and perfect for replacement of T8 fluorescent tubes. This linear tube provides 2200 lumens and has a CRI of 82. This lamp is engineered for high lumen maintenance over its 50,000 hour rated. Simply “plug and play” on Instant Start electronic fluorescent ballasts. Compatible with instant start, program start and rapid start T8 electronic ballast. Also compatible with fluorescent emergency ballasts. DLC® listed product.