The first fabricated light was likely a torch. In 4500 BC, lamps came into use, whose fuel source later evolved to methane, ethylene, and kerosene. You might think of an Aladdin lamp imagining them.It is astonishing to think that light bulbs have not been around that long and that the well known LED technology became widely available only about 20 years ago. Just to put things into perspective, let's briefly go through the key events in the evolution of electrical lighting.In the 1790s, the gas lamp was invented in England and brought to the United States. Subsequently, the first electric lamps were designed in the early 1800s, followed by light bulbs in the 1830s. In the early 1860s, fluorescent lights were...