Abstract: An energy saving HID lamp with a long lifespan is provided. In an embodiment of the invention, the lamp comprises at least two arc tubes within a quartz enclosure wherein each of the arc tubes has a tungsten cathode tip, an anode and xenon gas between the two electrodes. Only one arc tube is illuminated each time the power is switched on. A control system connected to the ballast circuitry provides dimming up to 50% of the total power of the lamp. Further a motion sensor and a preset timer positioned within the control system provide added energy savings and make the lamp highly suitable for street lighting, public parking and such purposes. The igniter is positioned at the base of the lamp so that the ballast can be located at a convenient location for easy servicing and handling.

Abstract: A method and apparatus for improving refrigeration and air conditioning efficiency for use with a heat exchange system having a compressor, condenser, evaporator, expansion valve, and circulating refrigerant. The apparatus includes a liquid refrigerant containing vessel having a refrigerant entrance and a refrigerant exit with the vessel positioned in the heat exchange system between the condenser and the evaporator, and means for creating a turbulent flow of liquefied refrigerant. The apparatus further preferably includes a refrigerant bypass path to sub-cool a portion of the refrigerant within the vessel; a disk positioned at the liquid refrigerant entrance to develop a low pressure area on the back side and create a turbulent flow of refrigerant entering the vessel; and a refrigerant valve incorporated into the refrigerant path downstream of the expansion valve and before the coil which develops a vortex that continues through the refrigerant coil.