The warranty of the most domestic electric products is three years. The key components of the E-liteled high bay is always from the big names in the world. The power supply comes from Meanwhile, the chips comes from Nicha, Cree, and OSRAM. The well-designed thermal management allows the led high bay to work in the extreme environment. E-lite led high bay could always work in -30 degree to 60 degree. The led high bay has the longest lifespan in all kinds of lamp s. The lifespan could reach 70,000 hours in theory, fifty times as the incandescent lamps, ten times as the high pressure sodium fixtures, and has a 5 years warranty for free.