The present invention generally relates to a method for forming a light extraction layer comprising nanostructures, the method comprising: providing a substrate, the substrate being at least partially transparent to UV light; forming a non-aqueous precursor solution comprising fluorine and an alkaline earth metal to form alkaline earth metal difluoride particles; applying the precursor solution on at least a first side of the substrate; drying the substrate at a first temperature for a first period of time; and baking the substrate at a second temperature, higher than the first temperature, for a second period of time, thereby forming a light extraction nanostructure layer comprising alkaline earth metal difluoride nanostructures on the substrate. The present invention also relates to a light extraction structure and to a UV lamp comprising such an extraction structure.

The invention describes a gas-discharge lamp comprising an inner vessel enclosing a pair of electrodes separated by a gap; and an outer vessel enclosing the inner vessel; and wherein the lamp comprises a lateral stripe arranged on the surface of a vessel such that the lateral stripe lies below a horizontal plane through a longitudinal axis through the center of the lamp, and wherein the lateral stripe extends essentially only over a region corresponding to the gap between the electrodes.

An innovative and highly efficient light system is disclosed herein. The light system includes a housing with an inner shroud and an outer shroud, a first light source and a second light source. The inner shroud is disposed within the outer shroud, and both light sources are disposed within the inner shroud. The second light source may produce light and heat. The heat from the second light source may be absorbed by the first light source to enable the first light source to more efficiently produce light. The light system may provide light from both the first light source and the second light source simultaneously. The inner surface of the outer shroud may contain an infrared reflective coating configured to retain the heat produced from the second light source within the housing while still enabling the output of the visible light produced by the first and second light sources.

A double-ended high intensity discharge lamp includes a luminous tube which comprises an inner tube and an outer tube. At least one electrical member is securely fastened inside the luminous tube and at least one illuminator supported inside the luminous tube with a distributor connected with the electrical member to receive power and supply the illuminator. The outer tube is another protective shield to stop spreading in explosion of the illuminator.

A double-ended high intensity discharge lamp includes a luminous tube which comprises an inner tube and an outer tube. At least one electrical member is securely fastened inside the luminous tube and at least one illuminator supported inside the luminous tube with a distributor connected with the electrical member to receive power and supply the illuminator. The outer tube is another protective shield to stop spreading in explosion of the illuminator.

The invention relates to a high-pressure discharge lamp having an ignition aid and comprising a discharge vessel, which is accommodated in an outer bulb. The ignition aid is a UV enhancer having a can-like container (12), which has an inner electrode (18). At least part of the end-face edge of the inner electrode at least comes close to the end face (24) of the container (12). An external electrode is attached to the outside of the container.

The invention relates to a high-pressure discharge lamp having an ignition aid and comprising a discharge vessel, which is accommodated in an outer bulb. The ignition aid is a UV enhancer having a can-like container (12), which has an inner electrode (18). At least part of the end-face edge of the inner electrode at least comes close to the end face (24) of the container (12). An external electrode is attached to the outside of the container.

A light emitting sealed body includes a housing which stores a discharge gas and is provided with a first opening to which first light is incident and a second opening from which second light is emitted, a first window portion which includes a first window member allowing the first light to be transmitted therethrough and hermetically seals the first opening, and a second window portion which includes a second window member allowing the second light to be transmitted therethrough and hermetically seals the second opening. Each of the first window member and the second window member is hermetically fixed to the housing by a joining material. A protection layer which covers the joining material is provided at at least one of a first joining position between the first window member and the housing and a second joining position between the second window member and the housing.

A high PAR maintenance rate type high pressure sodium lamp with an auxiliary starting switch is provided with an external glass tube and a discharge tube which is arranged at the center in the external glass tube and coaxial with the external glass tube. The surface of the discharge tube is provided with a metal lead. The left and right ends of an external glass shell are provided with pressure sealing plates which are fused and sealed through high temperature. The pressure sealing plates are internally provided with conductive sheets. One end of the discharge tube is connected with the conductive sheet of the left end through a left internal conductive support, and the other end is connected with the conductive sheet of the right end through an auxiliary starting switch component. According to the high pressure sodium lamp, the high pressure sodium lamp can be quickly lit up through a temperature controlled switch so that the high pressure sodium lamp has the advantages of being great in starting performance, great in lighting effect, high in stability, long in the service life, great in high temperature resistance and high pressure resistance and safe and reliable and is not liable to crack.

A double-ended ceramic metal halide lamp includes a luminous tube; at least two illuminators serially connected with each other deposed inside the luminous tube; and at least one ring-shaped retainers arranged between two illuminators to support the illuminators located along a central line of the luminous tube. A manufacturing method for a ceramic metal halide lamp includes following steps: (1) Arrange at least two serially connected illuminators inside an interior of a luminous tube; (2) Seal two ends of the luminous tube by a press sealing technique; and (3) Extract out the gas inside the luminous tube to form an eyelet at a central portion of the luminous tube.