The color of light, expressed in Kelvins (K). The sun is about 5800 Kelvins. This is called a "temperature," because the hotter fire gets, the more it changes from a warm yellow glow to white.
The lower the Kelvin rating, such as the common incandescent/tungsten bulb, the warmer, softer and more yellow the light. The higher the K number, the cooler, whiter and bluer the light.
Edison bulbs are bold vintage style lights that are named after Thomas Edison, who spent a large portion of his life working to improve the carbon filament and make incandescent lighting durable enough for practical use. These lights offer a stand-out look that is at once industrial and elegant, harkening back to when light bulbs themselves were a luxury. Nowadays, people love these bulbs for their intricately designed filaments, antique looking glass, and warm hued light. All of these features give vintage bulbs a lot of personality that stands in stark contrast to the clean cut and mass produced incandescents that most people are used to.
There are plenty of beautiful choices in the enormous variety of Edison bulbs out there; from interesting shapes like globe, flame tip, and test tube bulbs to understated classics such as radio style bulbs, any of these can add a unique feel to a space or fixture. In addition to the shape or the light, various glass colors and coatings such as amber or smoke colored glass, or even gold flecked finishes, can make a light bulb quite the statement piece.
When it comes to the best ways to display these bulbs, there are a variety of fixtures that can show them off beautifully. However, because so much attention is paid to the artistic filament shape and design, Edison bulbs look their best when used in lamps that show them off without a shade, such as certain styles of pendant lights or sconces. But that should not limit you in terms of what lights you use these in, as they do come in a wide range of sizes that can fit almost any fixture, from chandeliers to floor lamps. So no matter your taste in lighting, you can add a fun vintage feel to any space in your home!