Philips Light Bulbs Change Color

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Philips Light Bulbs Change Color – One-hundred-and-thirty years back, Thomas Edison completed the first successful ongoing test of this incandescent light bulb. With some incremental improvements on the way, Edison’s basic technology has lit the world ever since. This is all about to change. We’re on the cusp of a semiconductor-based lighting revolution that will finally replace Edison’s bulbs using a far more energy-efficient lighting solution. Solid state LED lighting will eventually replace almost all the hundreds of billions of incandescent and fluorescent lighting being used around the world today. In reality, as a step along this route, President Obama last June unveiled new, stricter lighting criteria that will support the phasing out of incandescent bulbs (which are banned in parts of Europe).

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To understand just how revolutionary LED light bulbs are as well as why they’re still expensive, it is instructive to check at how they’re fabricated and to compare this to the manufacture of incandescent light bulbs. This article explores how incandescent light bulbs are made then contrasts that process with a description of the typical production process for LED light bulbs. So, let us start by having a look at just how traditional incandescent light bulbs are manufactured. You will find this really is a classic instance of an automatic industrial process refined in more than a century of experience.


While human incandescent light bulb types differ in size and wattage, so all of them have the 3 basic parts: the filament, the bulb, and the foundation. The filament is made from tungsten. The connecting or lead-in wires are generally made from nickel-iron wire. This wire is dipped into a borax solution to make the wire more adherent to glass. The bulb itself is made from glass and contains a mixture of gases, generally argon and nitrogen, which increase the life of the filament. Air is pumped from the bulb and replaced using all the gases. A standardized foundation holds the entire assembly in place. Aluminum is used on the exterior and glass used to insulate the inside of the base.

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Originally produced by hand, light bulb manufacturing is now almost completely automated. |} First, the filament is fabricated with a process known as drawing, in which tungsten is mixed with a binder cloth and pulled through a die (a shaped orifice) into a fine wire. Next, the wire is wrapped around a metal bar called a mandrel in order to mold it into its proper coiled shape, then it is heated in a process known as annealing, softening the wire and leaves its construction more uniform. Secondly, the coiled filament is connected to the lead-in wires. The lead-in wires have pins at their ends which are either pressed over the conclusion of the filament or, in bigger bulbs, spot-welded.

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Third, the glass lamps or casings are produced using a ribbon machine. Once heating in a furnace, then a continuous ribbon of glass goes along a conveyor belt. Precisely aligned air nozzles blow the glass holes in the conveyor belt into molds, creating the casings. A ribbon machine going at high speed can produce more than 50,000 bulbs each hour. Following the casings are blown, they are chilled and then cut off from the ribbon machine. Next, the inside of the bulb is coated with silica to remove the glare brought on by a luminous, uncovered filament. The label and wattage are then stamped onto the exterior top of each shell.