HBG series are usually applied in hanging type lighting systems such as high/low bay lighting and dock lighting. In order to ensure the products have sufficient mechanical strength and durability under conditions of long-term hanging. MEAN WELL have enhanced the case design of HBG series by increasing three reinforcing ribs around the top of the case. This structural change does not affect the electrical specifications, and the features are still the same. Users can still continue to use the old version of HBG without any concern. Because of the stock of the old version, there will be a transition period for the version change. If you have any queries during this period, please feel free to contact your sales representative. For more details, please refer to the file below.