Carbon dioxide molecules can be fixed by growing plants through plant photosynthesis. When the photons that cause the plant synthesis are properly tuned to enhance plant photosynthesis and are generated by a combination of a solar panel of carbon footprint below a threshold and a LED light source of carbon footprint below a threshold and conversion efficiency above a threshold, more CO.sub.2 molecule will be fix by the plant photosynthesis than emitted by the system.

Carbon dioxide molecules can be fixed by growing plants through plant photosynthesis. When the photons that cause the plant synthesis are properly tuned to enhance plant photosynthesis and are generated by a combination of a solar panel of carbon footprint below a threshold and a LED light source of carbon footprint below a threshold and conversion efficiency above a threshold, more CO.sub.2 molecule will be fix by the plant photosynthesis than emitted by the system.

An LED light bar is provided, comprising an LED light bar body, a cover, and a light shut-off switch. The cover has a closing surface portion and a rear surface portion and is connected to the LED light bar body through hinges at the two side portions for closing and opening the first LED lights on the front portion, and the cover has at least two stable deploying positions including a closing position and an opening position. The light shut-off switch is provided on the first portion of the LED light bar body for turning off the first LED lights while the cover is in the closing position. The LED light bar may further comprise second LED lights disposed on the closing surface portion of the cover, and the light shut-off switch is further configured for turning off the second LED lights while the cover is in the closing position.

A car window screen system including a front window screen member, a rear window screen member and a side window screen member. The front window screen member including a first panel and a first plurality of magnets. The first plurality of magnets are attached to a front surface of the first panel for attaching the front window screen member to the car's front window by connecting the first plurality of magnets to a plurality of mating magnets installed along the interior perimeter surface of the car's front window. The rear window including a second panel and a second plurality of magnets. The second plurality of magnets are attached to a front surface of the second panel for attaching the rear window screen member to the car's rear window by connecting the second plurality of magnets to a plurality of mating magnets installed along the interior perimeter surface of the car's rear window. The side window screen member includes a third panel and a third plurality of magnets. The third plurality of magnets are attached to a front surface of the third panel for attaching the side window screen member to the car's side window by connecting the third plurality of magnets to a plurality of mating magnets installed along the interior perimeter surface of the car's side window.

A motion sensing traffic sign assembly for enhancing the visibility of traffic signs includes a traffic sign mounted on a stanchion to be visible to traffic. A control circuit is coupled to the traffic sign. A motion sensor is coupled to the traffic sign to detect traffic approaching the traffic sign and the motion sensor is electrically coupled to the control circuit. A plurality of light emitters is each coupled to the traffic sign. Each of the light emitters is turned on when the motion sensor senses motion to emit light outwardly from the traffic sign thereby enhancing visibility of the traffic sign for the traffic. A solar panel is coupled to the traffic sign and the solar panel is electrically coupled to the light emitters for powering the light emitters.

A portable device for generating and providing electricity is disclosed. The device includes one or more flat solar panels; one or more batteries arranged to be changed with electric power from the one or more flat solar panels; one or more lights arranged to be powered from the one or more batteries; one or more electric connectors arranged to receive electric power form the one or more batteries and to connect to combined power/data connections on portable electronic devices; and an expandable and collapsible housing holding the solar panels, batteries, and lights, and arranged to form a hollow inner volume when expanded and a flat panel when contracted.

A solar disk light has a central body and an annular shelf surrounding the central body and attached to the central body by one or more struts, defining a gap between an inner surface of the annular shelf and the central body. LEDs are disposed on the annular shelf. The central body has solar cells for harvesting solar energy and detecting ambient light. The central body contains a rechargeable battery for storing harvested solar energy, a switch, and wiring and driver electronics for operably connecting the solar cells, battery, switch, and LEDs. A translucent shell is on the disk light body, covering the annular shelf and LEDs, such that light emitted by the LEDs shines through the shell. The shell has an opening for receiving the central body such that the solar cells are not covered by the shell, the shell having an inner wall received in the gap.

A solar disk light has a central body and an annular shelf surrounding the central body and attached to the central body by one or more struts, defining a gap between an inner surface of the annular shelf and the central body. LEDs are disposed on the annular shelf. The central body has solar cells for harvesting solar energy and detecting ambient light. The central body contains a rechargeable battery for storing harvested solar energy, a switch, and wiring and driver electronics for operably connecting the solar cells, battery, switch, and LEDs. A translucent shell is on the disk light body, covering the annular shelf and LEDs, such that light emitted by the LEDs shines through the shell. The shell has an opening for receiving the central body such that the solar cells are not covered by the shell, the shell having an inner wall received in the gap.

A navigation aid light-signaling device includes a main body inserted in an upper extremity of a dolphin. The light-signaling device includes: fasteners for the attachment of said light-signaling device to the upper extremity of a small dolphin; at least one light source generating a directional and fixed light beam, said light beam being directed toward a second light-signaling device located at a given distance from the light-signaling device on a second dolphin, and a power supply supplying said light-signaling device.

A flame simulator includes a light beam source that projects a beam of light, a flame screen, a light beam mover that imparts movement to at least a part of the light beam source, and a range limiter. The light beam source includes a light source adapted to produce light and at least one light conditioner adapted to act on the light from the light source to produce the beam of light with a color, size and shape that mimics a flame when the beam strikes the flame screen. The range limiter is operatively associated with the light beam source so that the beam of light, when being projected, strikes at least a portion of the flame screen and causes illumination of the flame screen by the beam of light.