High pressure mercury vapour lamp

Their other advantages are a long bulb lifetime in the range of 20hours and a high intensity, clear white light output. The mercury vapor lamp is a high intensity discharge lamp. This is different from fluorescents which use the mercury vapor arc to create a weaker light that mainly creates UV light to excite the phosphors. Mercury Vapour lamps operating at high pressure (but below 1watts per centimetre of arc length) and with arc tubes of quartz glass are classified as the MB style.

Mercury vapour pressure is typically around ten atmospheres. The reason for the creation of this second category of mercury lamp was to allow the efficacy to be maintained as high as possible for low wattage sources. This standard specifies the performance requirements for high - pressure mercury vapour lamps for general lighting purposes, with or without a red correcting fluorescent coating. For some of the requirements given in this standar reference is made to the relevant lamp data sheet.

For some lamps these data sheets are contained in this standard. For other lamps , falling under the scope of this. All high -intensity-discharge lamps produce light from an arc tube that is usually contained in an outer glass bulb. FREE Delivery by Amazon. Temporarily out of stock.

The Quartz Mercury Vapour Lamp Its Possibilities and Uses in Public Health and General Practice. Mercury Vapor lamps feature low initial cost, but have higher operating costs than HPS or Metal Halide due to its lower efficiency. The clear mercury bulb has a bluish green appearance and the Deluxe White has a higher color rendering. Mercury lamps get dimmer over time and rarely burn out, so it is wise to replace them and restore light level.

High and Low Pressure UV Mercury Vapour Lamps Heraeus manufactures low and high pressure mercury vapour lamps used for applications such as photochemical processing, fluorimetry, mercury analysers, medical and environmental equipment, and fixed wavelength detectors. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 5nm. Two varieties of such lamps exist: low pressure and high pressure. Nature-Glow DUV Reptile Basking Lamp Mercury Vapour Combi. In case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that of the total input energy gets converted into 253.

Again transition of the electrons requires least amount of input energy from a colliding electron. Figure 6-shows the basic configuration of a HID lamp. In these lamps, a material, such as sodium, mercury , or metal halide, is added to the arc tube. Most models produce a bluish-white light. The arc discharge is generally confined to a small fused quartz arc tube mounted within a larger.

HIGH PRESSURE MERCURY VAPOUR LAMPS. In medium-pressure mercury-vapor lamps, the lines from 200–6nm are present. High Pressure Sodium Vapour lamps.

The lamps can be constructed to emit primarily in the UV-A (around 4nm) or UV-C (around 2nm). High-pressure mercury-vapor lamps are those lamp commonly used for general lighting purposes. They emit primarily in the blue and green.

The arc then heats up the mercury and the mercury vapor then lights, giving the lamp a bluish color. The lamp heats and the sodium is the last material to vaporize. The sodium vapor strikes an arc over 2C.