A runway arrangement comprising: a first runway section (202-1) designated as a landing runway section; a second runway section (202-2) designated as a take-off runway section; and a sterile safety area (210); wherein the first and second runway sections are linked by the sterile safety area (210); the runway arrangement comprising a missed approach point for aircraft due to land on the first runway section, displaced from the start of the second runway section (202-2) by a distance greater than H/tan θ.sub.1; where H is a safe turning height and θ.sub.1 is an angle of ascent following a missed approach; wherein H is greater than 150 m and θ.sub.1 is greater than 2°.

A runway arrangement comprising: a first runway section (202-1) designated as a landing runway section; a second runway section (202-2) designated as a take-off runway section; and a sterile safety area (210); wherein the first and second runway sections are linked by the sterile safety area (210); the runway arrangement comprising a missed approach point for aircraft due to land on the first runway section, displaced from the start of the second runway section (202-2) by a distance greater than H/tan θ.sub.1; where H is a safe turning height and θ.sub.1 is an angle of ascent following a missed approach; wherein H is greater than 150 m and θ.sub.1 is greater than 2°.

A system for lighting a volleyball court has four corner light assemblies, two side center light assemblies, and four mid-court light assemblies. Each corner light assembly has an upper light fixture adapted to emit light outward and downward at a level generally below a player's eye level and a lower light element mounted in a manner to emit light outwards and upwards. Each side center light assembly has two lower light fixtures adapted to emit light outward and downward at a level generally below a player's eye level and an upper light assembly adapted to emit light outwards and upwards at a level generally above a player's eye level. Each mid-court light assembly has a light fixture adapted to emit light outward and downward at a level generally below a player's eye level. By ensuring that no light is emitted at a player's eye level, glare is significantly reduced.

A system for lighting a volleyball court has four corner light assemblies, two side center light assemblies, and four mid-court light assemblies. Each corner light assembly has an upper light fixture adapted to emit light outward and downward at a level generally below a player's eye level and a lower light element mounted in a manner to emit light outwards and upwards. Each side center light assembly has two lower light fixtures adapted to emit light outward and downward at a level generally below a player's eye level and an upper light assembly adapted to emit light outwards and upwards at a level generally above a player's eye level. Each mid-court light assembly has a light fixture adapted to emit light outward and downward at a level generally below a player's eye level. By ensuring that no light is emitted at a player's eye level, glare is significantly reduced.

According to at least one aspect, a lighting system is provided. The lighting system comprises a strip lighting device including a circuit board, a light emitting diode (LED) mounted to the circuit board, a lens disposed over the LED and configured to receive the light emitted from the LED and change at least one characteristic of the light received from the LED, and an elastomer encapsulating at least part of the circuit board. The lighting system further comprises a fixture configured to receive the strip lighting device and mount to a structure and a lighting accessory configured to removably couple to the fixture over the strip lighting device and change at least one characteristic of the light from the strip lighting device.

According to at least one aspect, a lighting system is provided. The lighting system comprises a strip lighting device including a circuit board, a light emitting diode (LED) mounted to the circuit board, a lens disposed over the LED and configured to receive the light emitted from the LED and change at least one characteristic of the light received from the LED, and an elastomer encapsulating at least part of the circuit board. The lighting system further comprises a fixture configured to receive the strip lighting device and mount to a structure and a lighting accessory configured to removably couple to the fixture over the strip lighting device and change at least one characteristic of the light from the strip lighting device.

A runway arrangement comprising: a first runway section (202-1) designated as a landing runway section; a second runway section (202-2) designated as a take-off runway section; and a sterile safety area (210); wherein the first and second runway sections are linked by the sterile safety area (210); the runway arrangement comprising a missed approach point for aircraft due to land on the first runway section, displaced from the start of the second runway section (202-2) by a distance greater than H/tan θ.sub.1; where H is a safe turning height and θ.sub.1 is an angle of ascent following a missed approach; wherein H is greater than 150 m and θ.sub.1 is greater than 2°.

A runway arrangement comprising: a first runway section (202-1) designated as a landing runway section; a second runway section (202-2) designated as a take-off runway section; and a sterile safety area (210); wherein the first and second runway sections are linked by the sterile safety area (210); the runway arrangement comprising a missed approach point for aircraft due to land on the first runway section, displaced from the start of the second runway section (202-2) by a distance greater than H/tan θ.sub.1; where H is a safe turning height and θ.sub.1 is an angle of ascent following a missed approach; wherein H is greater than 150 m and θ.sub.1 is greater than 2°.

According to at least one aspect, a lighting system is provided. The lighting system comprises a strip lighting device including a circuit board, a light emitting diode (LED) mounted to the circuit board, a lens disposed over the LED and configured to receive the light emitted from the LED and change at least one characteristic of the light received from the LED, and an elastomer encapsulating at least part of the circuit board. The lighting system further comprises a fixture configured to receive the strip lighting device and mount to a structure and a lighting accessory configured to removably couple to the fixture over the strip lighting device and change at least one characteristic of the light from the strip lighting device.

A beam shading device capable of accurately positioning includes a substrate, a plurality of shading blades mounted on the substrate, and driving mechanisms for driving the shading blades to move. The substrate is provided with a first light-passing hole through which beams pass, the plurality of shading blades are arranged around the periphery of the first light-passing hole, and the driving mechanisms drive the shading blades to move back and forth between blocking and opening the first light-passing hole. Each shading blade is configured with at least two driving mechanisms, and each driving mechanism includes a driving gear and a driving plate. The driving plate is hinged with the shading blade, and the driving plate is provided with a rack that meshes with the driving gear.