Examples disclosed herein relate to a to a pitch gradient in a lamp filament, and a method of making. In one implementation, a lamp has a bulb filled with a gas. A filament is disposed within the bulb. The filament has a plurality of coils that include a first coil having a first point. The plurality of coils includes a second coil having a second point, and a third coil having a third point. The pitch gradient is defined by a first pitch between the second point and the first point, and a second pitch between the third point and the second point. The second pitch is greater than the first pitch. The second point is 360 degrees away from the first point. The third point is 360 degrees from the second point. A terminal coil is electrically coupled to at least the first coil, the second coil, and the third coil.

Examples disclosed herein relate to a to a pitch gradient in a lamp filament, and a method of making. In one implementation, a lamp has a bulb filled with a gas. A filament is disposed within the bulb. The filament has a plurality of coils that include a first coil having a first point. The plurality of coils includes a second coil having a second point, and a third coil having a third point. The pitch gradient is defined by a first pitch between the second point and the first point, and a second pitch between the third point and the second point. The second pitch is greater than the first pitch. The second point is 360 degrees away from the first point. The third point is 360 degrees from the second point. A terminal coil is electrically coupled to at least the first coil, the second coil, and the third coil.

A filament assembly includes a core and a filament. At least a central portion of the filament is disposed on the core. At least the central portion may be straight or may have a high-resistance configuration such as one in which the filament follows a path that changes direction. A thermionically emissive layer may be disposed on the core so as to encapsulate at least the central portion. The filament assembly may be utilized in any application requiring the production of electrons.

A filament assembly includes a core and a filament. At least a central portion of the filament is disposed on the core. At least the central portion may be straight or may have a high-resistance configuration such as one in which the filament follows a path that changes direction. A thermionically emissive layer may be disposed on the core so as to encapsulate at least the central portion. The filament assembly may be utilized in any application requiring the production of electrons.

An airport runway light for use as a runway approach light for a runway lighting system, the runway light having a light body with a base configured to support the runway light in a light socket of a runway lighting system, the base having an electrical connection to electrically connect the runway light to the runway lighting system, the light further including one or more output windows wherein the runway light has a high-efficiency infrared source and one or more infrared reflectors to direct the infrared source outwardly through the one or more output windows, the infrared source including a silicon nitride element wherein the infrared source produces virtually no detectable visible light and with much less power consumption.

An airport runway light for use as a runway approach light for a runway lighting system, the runway light having a light body with a base configured to support the runway light in a light socket of a runway lighting system, the base having an electrical connection to electrically connect the runway light to the runway lighting system, the light further including one or more output windows wherein the runway light has a high-efficiency infrared source and one or more infrared reflectors to direct the infrared source outwardly through the one or more output windows, the infrared source including a silicon nitride element wherein the infrared source produces virtually no detectable visible light and with much less power consumption.

An energy storage module includes a plurality of energy storage devices electrically connected together in series; and a plurality of electronics boards distributed across the module, in electrical contact with one or more of the energy storage devices. The module further includes a plurality of flexible printed circuit boards whereby each of the plurality of electronics boards are electrically connected together in series with a neighboring one of the plurality of electronics boards by a different one of the flexible printed circuit boards. For each electronics board and for each flexible printed circuit board, a ground plane is provided, whereby the ground planes provide electrical grounding at substantially the same potential across all the electronics boards and all the flexible printed circuit boards.

An airport runway light for use as a runway approach light for a runway lighting system, the runway light having a light body with a base configured to support the runway light in a light socket of a runway lighting system, the base having an electrical connection to electrically connect the runway light to the runway lighting system, the light further including one or more output windows wherein the runway light has a high-efficiency infrared source and one or more infrared reflectors to direct the infrared source outwardly through the one or more output windows, the infrared source including a silicon nitride element wherein the infrared source produces virtually no detectable visible light and with much less power consumption.

An airport runway light for use as a runway approach light for a runway lighting system, the runway light having a light body with a base configured to support the runway light in a light socket of a runway lighting system, the base having an electrical connection to electrically connect the runway light to the runway lighting system, the light further including one or more output windows wherein the runway light has a high-efficiency infrared source and one or more infrared reflectors to direct the infrared source outwardly through the one or more output windows, the infrared source including a silicon nitride element wherein the infrared source produces virtually no detectable visible light and with much less power consumption.

Disclosed is a filament support and a lamp with the filament support. The filament support may include a main rod, a plurality of branch rods and a plurality of support members. The plurality of branch rods are all installed on the main rod; the support members are arranged at ends of at least some of the branch rods, both ends of the support member are curved or bent towards a same side, resulting in that the support member surrounds to form a penetrating zone, and an opening for communicating the penetrating zone is formed between both ends of the support member. Both ends of the support member are curved or bent towards a same side, resulting in that the support member surrounds to form a penetrating zone, and an opening for communicating the penetrating zone is formed between both ends of the support member.