The 4ft LED Tube of 18W while delivering a significant amount of lumens can replace any T8, T10, or T12 fluorescent tube fixture of 50W and bring incredible energy savings. This product with a beam angle of 220° and 4000K (cool white light) color temperature works great for any commercial or industrial setting. the tube can provide for even and uniform lighting. his tube can work with & without a ballast. kindly check the ballast compatibility list. Being hybrid in design, this tube can work with or without the existing ballast. The UL, DLC listing ensures the complete safety of product use. You have a completely hassle-free manufacturer’s warranty for at least 3 years on this product.