Mercury Vapour Lamp

Definition - What does Mercury Vapour Lamp mean?

A Mercury Vapour Lamp is a gas discharge lamp that generates light from an electric arc by using vaporized mercury. In a Mercury Vapour Lamp, a borosilicate glass bulb confines the electric arc within a quartz arc tube of a small size. The bulb can be covered in phosphor or left clear. In such a case, the bulb of the Mercury Vapour Lamp provides safety from the UV radiation emitted by the light. The bulb also offers thermal insulation to the fused quartz arc tube. Similar to the functionality of a mercury barometer, a Mercury Vapour Lamp also operates on the atmospheric pressure.

Petropedia explains Mercury Vapour Lamp

A Mercury Vapour Lamp is an effective energy option as compared to fluorescent and incandescent lamps. It makes use of vaporized mercury through an electric arc that helps in producing light. A borosilicate glass bulb has a fused quartz arc tube in it, through which the arc discharge happens. A Mercury Vapour Lamp has a high intensity light output and the lifetime of the bulb is up to 24,000 hours. This makes it an ideal lighting option in the commercial and open places such as warehouses, factories and even streetlights. The mercury bulbs are often colored or color corrected with phosphor to make it easy for use.

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