1. If you purchase tubes with 1000PCS for one time, revising rate is less than 0.3% for a month after instalation, less than 1% for 3 years; We'd like to pay 10% as idemnity for the revising ones;
2. The luminous maintenance rate is over 90% for 3 years, over 70% for 5 years; We'd like to return them amd give you replacements if any tube can't meet the standards;
3. The warranty is 3 years for free, if you still want another 2 yeas for warranty, you have to pay 8% of the total for each year.