An embodiment provides a lamp apparatus, including: at least one filament; an amount of amalgam; a heat-sink assembly connected to the lamp apparatus; and at least one control circuit comprising a heating element and a temperature measurement element connected to the at least one filament, wherein the control circuit varies the electrical power delivered to the heating element, thereby controlling an internal temperature of the lamp apparatus relative to a temperature set point. Other aspects are described and claimed.

An ultraviolet lamp includes a lamp tube and an electrode. A discharge cavity is formed in the lamp tube. A thermistor is disposed on an end socket at a first end of the lamp tube. A receiving groove communicated with the discharge cavity is formed in the end socket and contains amalgam. The thermistor heats the amalgam in the receiving groove in the end socket. The Curie temperature of the thermistor ranges from [T1+(T2−T1)/5] to [T1+4*(T2−T1)/5], wherein T1 and T2 are respectively a minimum operating temperature and a maximum operating temperature of the amalgam in a continuous region where the ultraviolet radiation power is from 90% to 100% when the input power of the ultraviolet lamp is 100%.

An embodiment provides a lamp apparatus, including: at least one filament; an amount of amalgam; a heat-sink assembly connected to the lamp apparatus; and at least one control circuit comprising a heating element and a temperature measurement element connected to the at least one filament, wherein the control circuit varies the electrical power delivered to the heating element, thereby controlling an internal temperature of the lamp apparatus relative to a temperature set point. Other aspects are described and claimed.

UV lamp modules for the ultraviolet irradiation of a substrate. The modules include multiple low-pressure mercury lamps, each having a longitudinal axis, located in a waterproof housing having a bottom, a top and a beam exit opening in the bottom which is closed by a beam exit window. To maintain hygiene, homogeneity and compactness, a first airflow zone for the supply of cooling air and a second, separate airflow zone for the discharge of heated cooling air are formed iii the housing. Viewed in a cross-section through the housing perpendicular to the longitudinal axes of the lamps and in a viewing direction from the bottom to the top, the beam exit window, the lamps and the airflow zones are arranged one after the other. The first airflow zone comprises an air supply duct which is equipped with at least one air-guiding mechanism for supplying cooling air to the lamps.

UV lamp modules for the ultraviolet irradiation of a substrate. The modules include multiple low-pressure mercury lamps, each having a longitudinal axis, located in a waterproof housing having a bottom, a top and a beam exit opening in the bottom which is closed by a beam exit window. To maintain hygiene, homogeneity and compactness, a first airflow zone for the supply of cooling air and a second, separate airflow zone for the discharge of heated cooling air are formed iii the housing. Viewed in a cross-section through the housing perpendicular to the longitudinal axes of the lamps and in a viewing direction from the bottom to the top, the beam exit window, the lamps and the airflow zones are arranged one after the other. The first airflow zone comprises an air supply duct which is equipped with at least one air-guiding mechanism for supplying cooling air to the lamps.

A germicidal UV amalgam lamp with an elongated tubular lamp body and at least two filaments located on opposite ends of the lamp body. The lamp body is hermetically sealed with a pinch-sealed portion at both opposite ends, confining a gas volume in which a gas discharge can be produced along a discharge path between the filaments. Each filament has two electrical connectors, each including an internal portion connected to the filament and pinch-sealed into the lamp body. Each connector also includes an external portion located outside the lamp body for electrical connection of the lamp to a controlled power supply. The pinch-sealed portion bears a socket with an electrical temperature sensor and at least two electrical connections mounted to the socket. The at least two electrical connections of the temperature sensor are connected in parallel to the electrical connectors of the filament.

A germicidal UV amalgam lamp with an elongated tubular lamp body and at least two filaments located on opposite ends of the lamp body. The lamp body is hermetically sealed with a pinch-sealed portion at both opposite ends, confining a gas volume in which a gas discharge can be produced along a discharge path between the filaments. Each filament has two electrical connectors, each including an internal portion connected to the filament and pinch-sealed into the lamp body. Each connector also includes an external portion located outside the lamp body for electrical connection of the lamp to a controlled power supply. The pinch-sealed portion bears a socket with an electrical temperature sensor and at least two electrical connections mounted to the socket. The at least two electrical connections of the temperature sensor are connected in parallel to the electrical connectors of the filament.

The invention relates to a phosphor for a UV emitting device, having the formula Na.sub.1+xCa.sub.1−2xPO.sub.4:PR3.sup.+.sub.x wherein 0<x<0.5.

The invention relates to a phosphor for a UV emitting device, having the formula Na.sub.1+xCa.sub.1−2xPO.sub.4:PR3.sup.+.sub.x wherein 0<x<0.5.

A mercury discharge lamp includes: a discharge tube having encapsulated therein mercury in the form of an amalgam; and a temperature control member that controls an ambient temperature of the amalgam in such a manner as to compensate for a change in the ambient temperature of the amalgam. The temperature control member may include a bimetal supporting the amalgam at a predetermined position, and the support member is formed or constituted by a bimetal. By the bimetal deforming in response to a change in the ambient temperature of the amalgam, the temperature control member changes a spaced-apart distance of the amalgam to a filament within the discharge tube and thereby changes an influence of heat generation by the filament on the amalgam. The temperature control member may include, near the amalgam, a resistance element whose resistance value changes in response to a temperature to control heat generation thereby.