we will also test its temperature after 24 hours lighting. Then after it is cool we again test of the lamps to see if it still work well. Each lamp should pass all these QC procedures before shipping to customer.Delivery time:1. Samples: 3-7 working days; 2. Bulk order: 7-15 working days.Delivery details:We ship goods by UPS/DHL/FEDEX/TNT express which takes 3~ 5 days to arrive. China post and sea shipping is also optional. It’s depending on your actual requirements.Our services:1. For all you