The bulkhead looks quite big in size, however it is quite light in weight, it is consisted with numerious aluminium fins and copper pipe if it's more than 250W, the idea of this bulkhead is to achieve an efficient heatsinking system. The heat created from the LEDs will be rapidly transfered to the bulkhead fins through the copper pipes, this type of design will enhance the lifespan of the high bay light.

Vine Lighting LTD