Well, to enforce the 1,000 hour limit, each of the manufacturers have to send in sample bulbs from their factories and they were tested on big test stands like this one.

那么, 为了执行 1000 小时的限制, 每个制造商都必须从工厂寄来灯泡样品，然后在像这样的大型测试台上进行测试。