There was a manufacturer of bearings before, and samples were made in our company. Their company used T5 fluorescent lamps. Now we don't want to tear down the shelf and change it into T8. We made the T8 to T5 fluorescent tube. But the customer request to use 24V DC regulated power supply, we have one power supply with 4 lights. According to the requirements of the 25W, the last sample customer is satisfied, this time we require bulk order of 400.