The present disclosure provides an LED straight light including a light tube with two pins at both ends, an LED installed in the light tube and a driving circuit. The driving circuit includes a mains branch and a signal branch. The mains branch is coupled to the pins at one end of the light tube for transmitting power to the LED for power supply. The signal branch is coupled to the pins at the other end of the light tube for transmitting external driving signals to control the on/off of the mains branch. The LED straight light of the present disclosure is powered by two ends, one of the two ends supplies power to the LED through the mains branch, and the other end receives driving signals to control the on/off of the mains branch.

The present disclosure provides an LED straight light including a light tube with two pins at both ends, an LED installed in the light tube and a driving circuit. The driving circuit includes a mains branch and a signal branch. The mains branch is coupled to the pins at one end of the light tube for transmitting power to the LED for power supply. The signal branch is coupled to the pins at the other end of the light tube for transmitting external driving signals to control the on/off of the mains branch. The LED straight light of the present disclosure is powered by two ends, one of the two ends supplies power to the LED through the mains branch, and the other end receives driving signals to control the on/off of the mains branch.

A vehicle rooftop beacon for drawing attention to a vehicle from afar. The rooftop beacon includes a base, and a light beacon elevatable above the base by an extendable mast. The base also has at least three support feet to stabilize the rooftop beacon when placed upon a vehicle rooftop. The light beacon is thereby supported high above the vehicle rooftop so that the vehicle is more visible to emergency response vehicles from far away. The base can also include a plurality of side-mounted or edge-mounted lights to further call attention to the vehicle. The rooftop beacon is convenient, portable, and lightweight. The support feet can include magnets or weights to stabilize the rooftop beacon on the vehicle rooftop in windy or stormy conditions. The support feet also can include a soft foot covering, such as rubber, to prevent scratching and slipping off of the surface of the vehicle rooftop.

A vehicle rooftop beacon for drawing attention to a vehicle from afar. The rooftop beacon includes a base, and a light beacon elevatable above the base by an extendable mast. The base also has at least three support feet to stabilize the rooftop beacon when placed upon a vehicle rooftop. The light beacon is thereby supported high above the vehicle rooftop so that the vehicle is more visible to emergency response vehicles from far away. The base can also include a plurality of side-mounted or edge-mounted lights to further call attention to the vehicle. The rooftop beacon is convenient, portable, and lightweight. The support feet can include magnets or weights to stabilize the rooftop beacon on the vehicle rooftop in windy or stormy conditions. The support feet also can include a soft foot covering, such as rubber, to prevent scratching and slipping off of the surface of the vehicle rooftop.

Some examples of an active-alerting apparatus (AAA) are disclosed. The AAA is configured to be associated with a standing vehicle. Some embodiments of the AAA can have a structure of a flag (AAF) other embodiments of AAA can have a structure of a triangle (AAT) other can have a structure of a folding triangle (FAAT). Examples of AAA can be associated to a window of the standing vehicle or to an adaptor for holding the AAA. The adaptor can be a pip that is associated with the back of the wagon and is configured to hold the AAA such that the AAA faces the coming traffic. The AAA can be associates with retro-reflecting red area, red-fluorescent area and one or more light sources, such as LEDs.

Some examples of an active-alerting apparatus (AAA) are disclosed. The AAA is configured to be associated with a standing vehicle. Some embodiments of the AAA can have a structure of a flag (AAF) other embodiments of AAA can have a structure of a triangle (AAT) other can have a structure of a folding triangle (FAAT). Examples of AAA can be associated to a window of the standing vehicle or to an adaptor for holding the AAA. The adaptor can be a pip that is associated with the back of the wagon and is configured to hold the AAA such that the AAA faces the coming traffic. The AAA can be associates with retro-reflecting red area, red-fluorescent area and one or more light sources, such as LEDs.

An unmanned aircraft is described. The unmanned aircraft includes a signal output unit and a control unit. The control unit receives at least one signal to be output by the signal output unit. The control unit transmits at least a first signal to the signal output unit, so that the signal output unit outputs the first signal. The unmanned aircraft may be used stand-alone or autonomous as a movable signal output device, but it may also be coupled with a carrier vehicle to meet the function of a signal output device at the carrier vehicle.

An unmanned aircraft is described. The unmanned aircraft includes a signal output unit and a control unit. The control unit receives at least one signal to be output by the signal output unit. The control unit transmits at least a first signal to the signal output unit, so that the signal output unit outputs the first signal. The unmanned aircraft may be used stand-alone or autonomous as a movable signal output device, but it may also be coupled with a carrier vehicle to meet the function of a signal output device at the carrier vehicle.

A warning structure includes a bracket and a warning member mounted on the bracket. The bracket includes a main body, rollers rotationally mounted to the main body, and a stopping assembly including a support member, a mounting member, and a resilient member. The support member is coupled to the main body. The mounting member is movably mounted to the support member. The rollers are mounted to the mounting member and the main body. The resilient member elastically resists the support member and the mounting member to bias the mounting member. When the support member is subjected to a downward force, the support member abuts against a ground to keep the bracket stationary.

A warning structure includes a bracket and a warning member mounted on the bracket. The bracket includes a main body, rollers rotationally mounted to the main body, and a stopping assembly including a support member, a mounting member, and a resilient member. The support member is coupled to the main body. The mounting member is movably mounted to the support member. The rollers are mounted to the mounting member and the main body. The resilient member elastically resists the support member and the mounting member to bias the mounting member. When the support member is subjected to a downward force, the support member abuts against a ground to keep the bracket stationary.