A new and useful system, method and system components are provided, for helping a vehicle operator to ease his/her driving, when is driving at certain speed and is approaching from at a substantial distance to a street intersection so that the decision of whether the vehicle speed should be reduced or maintained can be made at convenient time. By providing with anticipated information relative to an imminent light change, a vehicle operator will have the sufficient time to react calmly to any situation that could put at risk his/her own integrity and/or the integrity of some others. This new and improved traffic control system is designed in a manner that is efficient and effective, in a manner that is useful and helpful, in a manner that is designed in a compact and low profile design; It is designed the best and the most simple way to provide and give to a vehicle operator a better, safely, relaxing and a pleasant driving.

A lighting device includes at least one first electrically activated emitter, at least one lumiphor support element comprising a lumiphoric material spatially segregated from the first electrically activated emitter and arranged to receive at least a portion of emissions from the first electrically activated emitter, and at least one second electrically activated emitter disposed on or adjacent to the at least one lumiphor support element. First and second electrically activated emitters having different peak wavelengths may be in conductive with first and second device-scale heat sinks, respectively.

A lighting apparatus includes a first substrate, a plurality of first light-emitting devices disposed on the first substrate, a second substrate disposed over the first substrate, and a plurality of second light-emitting devices disposed on the second substrate. A reflective surface is disposed between the first substrate and the second substrate. The reflective surface is configured to reflect light emitted by at least some of the first light-emitting devices in a direction that is at least partially toward the first substrate. The reflective surface has one of: a saw-patterned side view profile, or a curved side view profile that is free of having an inflection point.

A transparent luminescent sheet and a lamp apparatus using the same are disclosed. The transparent luminescent sheet realizes a lamp function through emission of light from a sheet thereof configured to be transparent and secures a desired luminous efficacy and a desired freedom of design. In the transparent luminescent sheet, transparency is enhanced in a turn-off state and, as such, visibility is secured at the inside and the outside. A lit image is realized through light during a light emission operation. In addition, light emitted toward the inside is shielded or reduced, thereby preventing indoor dazzling.

A device for projecting light beams includes a first panel having a first plurality of LED sources, each having a collimator device to obtain a beam of parallel light rays along a direction of emission, and a second panel having a second plurality of LED sources. The second panel is positioned in front of the first panel, relative to the direction of emission, to have LED sources positioned with a center of emission coinciding with the center of emission of a corresponding number of LED sources of the first panel. The second panel has, for each LED source positioned coinciding with the center of emission of the respective LED source of the first panel, a relative open section, surrounding its LED source, configured as an opening for the free passage of the light beam generated by the respective LED source of the first panel.

A lighting system includes an enclosure that has a back section, side sections, a front section with a front mounting frame, and an interfacing step extending from or coupled to the side sections and located between the front section and the back section. The enclosure includes an outer surface facilitating heat transfer into the environment. The lighting system also includes a conduction frame attached to the interfacing step, and one or more light emitting assemblies attached to the conduction frame. Each of the light emitting assemblies includes a conduction member and a light source attached to the conduction member, and where each conduction member facilitates heat transfer from the light source to the conduction frame. Additionally, a front housing assembly is attached to the front mounting frame of the front section to seal the enclosure from the environment.

An ultraviolet sterilization and plant growth system can be mounted to an air duct to sterilize the air and then selectively removed and used in a portable mode to sterilize surfaces or enhance plant growth. The system includes a housing, a heatsink element, an array of ultraviolet light-emitting diodes (LEDs) to generate directional beams of ultraviolet radiation, and an electronic driver to control the LEDs. One or more power interfaces allow for operation in AC mode when connected to a power receptacle or in DC mode when powered by a portable source. In addition to its sterilization capabilities, the system incorporates tunable LEDs and programmable light recipes designed to support plant health and growth. These include specific light frequencies for vegetative growth, flowering, and pest control, making the system a versatile solution for both sterilization and horticultural applications.

A transparent luminescent sheet and a lamp apparatus using the same are disclosed. The transparent luminescent sheet realizes a lamp function through emission of light from a sheet thereof configured to be transparent and secures a desired luminous efficacy and a desired freedom of design. In the transparent luminescent sheet, transparency is enhanced in a turn-off state and, as such, visibility is secured at the inside and the outside. A lit image is realized through light during a light emission operation. In addition, light emitted toward the inside is shielded or reduced, thereby preventing indoor dazzling.