The present disclosure relates to a lighting device that employs at least one string of LEDs as a lighting source. The patterned carbon nanotube layer is formed on the substrate. The sacrificial gate structure includes two spacers and sacrificial gate material between the two spacers. When in liquid fuel operation, the gas circuits are purged with compressed air and liquid fuel and water pass through coaxial passages to the tip of the dual fuel premix fuel nozzle, where they inject liquid fuel and water into the secondary combustion chamber.