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 6500K (cool white light) color temperature works great for any commercial or industrial setting. Being frosted, 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 listing ensures complete safety of product use. You have a completely hassle-free manufacturer’s warranty for at least 5 years on this product.