The customer who made the T4 connection last time has asked for 20 sample tubes. This tube is made of all plastic pipes and sealed with Japanese glue. Use waterproof long plug, and T4 connection line. This T4 connection is hard to find, and the customer needs unconventional and customized. The inner substrate is 5W, and 0.5 of the bulbs are used for lowering power. With the plug power supply, the 400 long lamp tubes are particularly delicate, just to meet the requirements of customers.