2HQ5 tubes are glass devices consisting of two electrodes enclosed in an evacuated glass envelope. The devices are designed to emit light when a current is applied, making them ideal for use in a variety of lighting applications, such as tube lighting and LED devices. These tubes can produce a variety of colors depending on the type of material and coating used to produce the tube; for example, the use of phosphor-coated tubes can produce a wide range of colors.
2HQ5 tubes contain two electrodes: a cathode, which releases electrons when a current is applied, and an anode, which collects the electrons as they are released. These tubes are filled with a gas mixture, which helps to control the emission of light. The electrodes can be either stainless steel or tungsten, with the former being preferable for brighter light output.