The first Christmas tree was lit by Edward Johnson (an inventor who worked under the direction of Edison) using electricity in 1882. Then they were mass produced around 1890. By 1900, department stores started using it for their Christmas displays.
The first red-green electric traffic light was invented by policeman Lester Wire in Salt Lake City, Utah. As the number of vehicles in America increased, the traffic light was a solution to manage the traffic flow in the streets. The traffic light signals a vehicle when to stop and go.
The turn signal was invented in 1907 and was introduced by Buick in 1938. This light informs the vehicle at your rear that you are turning left or right. By informing this to the vehicle on your rear, this prevents accidents from not keeping distance between vehicles.
The first neon lighting tube (applying electrical discharge to a sealed tube of neon gas to create a lamp) was invented by French engineer, chemist, and inventor Georges Claude in 1910. He patented the neon lighting tube on 1915. Then in 1923, Claude and his company introduced Neon Signs to the US. Neon lighting quickly became a popular fixture in outdoor advertising.
These light are single LED lights that change color. By the light doing this, it helps the user to set different kinds of moods in their room and also creating different kinds of atmosphere to it. It is also scientifically proven that mood lights can help cure mental diseases.