Jandy LD 400,000 BTU Lite2 Electronic Natural Gas Electronic Ignition Heater Introducing the New Lite2 LJ Heater with Jandy Technology Inside! Jandy's expertise in electronics has been added to the design of the new, technologically advanced Lite2 heater. Its easy, programmable features make life around the pool more enjoyable. Built for dependability and efficiency, the Lite2 is one of the most reliable heaters on the market. High-performance insulation and efficient operation make this heater an excellent value.