... Procedure is very importent to customers, which can make you clear about how to install it and how to use it. 1) All ... years 1).If driver failed, we'll send you a new driver; 2).If LED failed, we'll ... Every Day.Also with workmanship inspection.3). Aging test: 36h aging test to confirm all quality is OK.4). Warehouse ... ).All managed by software2.Payment Term O/A,L/C,D/A,D/P,T/T,Western Union,Paypal ...