Long before Rubicon Technology was manufacturing sapphire for LEDs, it was the incandescent light bulb that illuminated our world. More than one-hundred years ago – in 1879 to be precise -Thomas Edison patented the first incandescent light bulb, igniting the lighting industry and paving the way for the ‘world after dark’ that we enjoy today.
Because of the steady warm glow they produce, incandescent bulbs were soon found to be fitting for most household applications. Fluorescent tube lights, on the other hand, were later developed to produce brighter neon light and be more efficient, making them suitable for commercial applications, such as offices, hospitals and stores.
An outgrowth of the Germans’ 19th century invention of the Geissler tube, the first real challenger to the incandescent bulb for home use, the compact fluorescent lamp (CFL), hit the market in the mid-1980s. Although they were significantly more efficient than incandescent light bulbs, at a retail price of $25-$35, CFLs were also more expensive, deterring consumers at first from purchasing them.
Since the 1990s, however, improvements in CFL performance, price, efficiency and lifespan have led to a rise in their popularity – not to mention they became one of few lighting alternatives available after the phase out of the incandescent bulb began in 2014.
When it comes to which type of light bulb will reign as king in the 21st century, LEDs have undoubtedly stolen the spotlight from CFLs. In addition to being one of the fastest developing lighting technologies today, LEDs are currently the most efficient lighting source on the market.
The first visible-spectrum LEDs were invented in 1962 by Nick Holonyak in the form of red diodes. These initial LEDs first became available to the public in the form of indicator lights and calculator displays in the 1970s. The invention of the blue diode in the 1990s by American Shuji Nakamura, along with Japan’s Isamu Akasaki and Horoshi Amano, quickly led to the development of white LEDs.
Ever since the invention of the white LEDs, we have seen their use explode in a variety of applications. They are now being used in major national and international landmarks such as the Empire State Building and Sydney Opera House, transforming these buildings into energy-efficient and eco-friendly locations. In addition, LEDs have made notable appearances at major events this year all across the globe, including Super Bowl XLIX in the U.S. and Chinese New Year celebrations in both China and Malaysia.
Aside from the more conventional lighting applications, LEDs are also being utilized in the beauty and health industry. NASA developed LED facial technology that is said to plump up aging skin, boost collagen and treat acne. In Iran, LEDs are being used in the treatment of cancerous and precancerous skin lesions and could be used in the treatment of skin cancer in the future.
LEDs have the potential to affect the modern world even more than the original incandescent bulb did in the 20th century. As costs continue to fall and more out-of-the-box applications are discovered, it is clear there is no stopping LEDs from taking over the world.