The cobalt series by Xeleum Lighting offers a sleek design form modern applications. They come in 3000K, 3500K, 4000K, and 5000K color temperature options to choose from. Typical 2′ x 4′ ceiling troffers use (3) T8 Florescent tubes at 32W each and approximately 24W for the ballast for a total of 120W for the fixture. If you changed out your current florescent 2′ x 4′ ceiling troffer to the colbalt series LED ceiling troffer you could save 75W per fixture or 62.5% savings. Check out our Energy Savings Calculator to determine your ROI (Return On Investment). Each fixture carries a 5 year warranty. These fixtures are not stocked at LED There Be Light but with the manufacture. Stock can very from time to time so it is best to contact us to see what the current delivery time is at the time you want to purchase them.