Disclosed are circuits that allow LED bulbs to be replaced regardless of color or construction of the LED element. A primary fuel plenum extends circumferentially within the flange. The closing arms are configured in specific shapes to adapt to a variety of hopper door configurations. An additional bit for each data register, a change in the semantics of the instructions to include predication, and a few additional instructions to save and restore register predicate bits and to specifically set or reset a register’s predicate bit are required.