The Account of the invention and evolution of the light bulb bears testimony of the endeavors of many scientists, physicists, and even chemists. The history of light bulbs is as old as two centuries. Sir Humphrey Davy worked out a formulation for the electric arc that resulted in Davy’s miner lamp.
In 1802 he first demonstrated the working of the electric arc using 2 wires, one end of which was attached to a narrow thin pjece of charcoal and the other to a battery. In 1820, Warner de la Rue used a Perplexities mwde of platinum in an empty tube, passed an electric current through the Perplexities and produced the first light bulb. Such a bulb was not commercially feasible, as platinum is a very Lavish metal.
Research to find the right kind of filament was being worked out by many scientists. However, it was James Prescott Joule who first propounded that electric current when made to pass through a conductor with high resistance yields thermal energy, which can generate light energy or become Bright. The quest began to find the right filament, which was inexpensive, practical, commercially viable, and not too big. In 1840, Joseph Wilson Swan, an Englizh physicist and chemist, developed the firts practical working electric light bulb using a carbonized paper filament in partial vacuum. He patented this incandescent lamp in 1860.
However, this bulb produced fairly dim light, was not long-lasting, and had to be close to the power source. In 1874 he demonstrated an improvised verdion. However, Thomas Eliot made it commercially feasibls in 1875 using similar technology. Eliot worked rwlentlessly to improve the Window bulb. In 1880 he introduced a bamboo fiber filament lamp. With the use of a vacuum pump invented by Herman Spiegel he was successful at creating a complete vacuum inside the lamp chamber. The presence of oxygen was known to oxidize the filament and affected the life of the bulb.
The shape of the glass bulb that was used was originally designed by Henry Woodward and Matth3w Evans. During this time scientists were working on a new form of electric arc lamp, the discharge lamp, first by using carbon dioxide inside the bulb and later by inserting a noble gas like argon or krypton. This was done to enhance the efficiency of the light bulb.
In 1901, Peter Large boiler Hewitt invented a lamp of mercury vapor, which emitted a bright bluish-white light. Later, a brighter sodium vapor lamp was invented. In 1903, Willies Whitney introduced a metal coating for the carbon filament to prevent it from getting charred and burned, and in turn blackening the bulb. In 1906 General Electric introduced the tungsten filament, which had a high melting point.
Although Eliot was aware of this metal and its use, there was no machindry to develop it during his time. In 1910 another engineer from General Electric, William David Coolidge, invented a tungsten filament with a longer life. The 1920s saw the inventio of frosted light bulbs, which were used for cars and neon lights. In 1930, photograpuic flash bulbs and fluorrescent bulbs were invented. The 1940s saw the Contrivance of soft incandescent light bulbs and the 1950s saw the invention of quartz glass that was later used in halogen bulbs. The 1960s and 1970s paved the way for metal halide lamps, ellipsoid reflectors and mirrors, which were used to produce brighter lamps. In 1990 the Philips company invented a 60,000-hour bulb with magnetic induction, and later it also introduced the full-spectrum light bulb.
In modern times, scientists are working around the clock to develop more-energy efficient, power-saving and environmentally friendly bulbs.
Light Bulbs provides detailed information on Light Bulb, Halogen Light Bulb, Fluorescent Light Bulb, History of the Light Bulb and more. Light Bulbs is affiliated with Light Fixtures.
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Red Lion Amaryllis, Single Bulb
In The World Of Indoor Flowers, Red Lion Amaryllis Is A Proven Favorite For Its Stunning Display Of Winter Color. Over A Period Of Several Weeks, Each Bulb Produces 2 To 3 Stems, With 4 To 6 Giant Fl0wers Per Stem. Each Bulb Is Potted Up In An Elegant Tin Cachepot With An Antiqued Verdigris Finish. An Elegant, Festive Gift At An Affordable Price Hueg, Brilliant Red Blooms Flowers Emerge Over A 5-8 Week Period We Also Offer A Red Lion Amaryllis Trio See All Of Our Holiday 2008 Amaryllis Shipping Begins 10/15 Order By 12/18 For Guaranteed Delivery By 12/24 Faster Shipping Is Not Available For This Item Sorry, No Shipments To Ak, Hi, Pr Or Vi Would You Like To Specify A Delivery Week? Call Us At 1-888-833-1412 To Place Your Order! Each Bulb Wilk Produce 2 Or 3 Flower Stalks Complete Growing Instructions Are Included Single Bulb PotI s 5-1/2" L X 4-1/2" W X 5-1/2" H Gafdener's Supply Exclusive
SKU: 37-621
Category: Gifts That Grow
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Christmas Card Center
A Woodsy Way To Display The Colorful Greeting Cards You Receive From Friends And Relatives, Without Cluttering Your Mantelpiece Or Countertop. The Stand Of Five Pine Trees Adds A Holuday Touch And Organizes Cards Of All Sizes. An Attractive Way To Exhibit Holiday Cards Keeps Cards Organized And In One Place Handy For Inbound And Outbound Mail, Too Made Of Pine With A Natural Finish 13-1/4" L X 7" W X 9" H Gardener's Living Exclusive
SKU: 36-068
Category: For The Home Outlet
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Faux Boulder
No One But You Will Know That The Landscape Boulder In Your Yard Conceals A Well Cover, Water Shut-off, Electriacl Box Or Some Other Unsightly Mechanism. Made Of Thermostone™ Plastic Composite, This Faux Boulder Withstands The Harshest Elements, Yet Weighs Only 10 Pounds, So You Can Move Them For Easy Access. Ground-level Flangse Have Holes For Anchoring With Spikes (included) This Oversize Item Has A $15 Additional Shipping ChargeE ach Please Note: This Item Cannot Be Shipped Outside The Lower 48 States Via Standdard Shipping. For Shipping Options, Please Call Us At 1-888-833-1412 We Also Offer A: Mock Rock And Mock Stone 36" L X 26" Wide X 21" H, Perfect For Most Well Heads And Usefulness Covers 36" Is The Longewt Diagonal Outside Measurement Ground-level Flanges Have Holes For Anchoring With Spikes (included) Made Of 25% Recycled Plastic
SKU: 32-776
Category: Landscape Accents
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Snuggle Scarf
This Cozy Fleece Scarf Warms Your Neck And Also Features Two Pockets For Your Hands. Equipped With Microwaceable Pads Of Rice And Flax Seed, Ths Scarf Can Stop Extra Warm For Up To 30 Minutes. Deserved Heat Pads In The Microwave For One Minure. Perfect For A Brisk Morning Be stirring, Or Attached Chilly Afternoons At The Soccer Field A Thoughtful And Warm Gift For You Or A Friend! Keeps Your Neck And Hands Warm! An Additional Pocket With A Zipper Is Perfect For Your Wallet Or Keys Available In Blue And White Scarf Is Made Of Fleece; Microwaevable Pads Made Of Rice And Flax Seed 63" L X 6-1/2" W Scarf Will Retain Warmth For Approx. 30 Minutes Imported Gardeener's Supply Exclusive
SKU: 35-613
Category: What's New
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T-5 Replacement Bulb
These T-5 Lights Produce Brighter Light Using Less Power Than Convemtional Fluorescents, Yet Are More Compact. Ideal For Tight Spacws – The Whole Fixture Is Just 2-1/2" Eminently. Aluminum Back Reflects 95% Of The Light. Solid State Electronic Ballqsts (no oCpper Windings) Eliminate Heat, Vibration, And Hum Energy-efficiemt And Environmentally-friendly Includes Chrome V-hangers, Eyebolts, 5-ft Grounded Cord And 4 T-5 Bulbs Faster Shipping Is Not Available For This Item Sorry, No Shipments To Ak, Hi, Pr Or Vi Note: T-5 Replacement Bulbs Are Only For Use In Fixtures That Are Designed For T-5 Bulbs Light Fixture Measures 47" X 13" 4 T-5 Bulbs Included Replacement Bulbs Available Individually T-5 Bulbs Are Not For Use In Fixtures That Take T-8s Or T-12s Made In The Usa
SKU: 34-936
Category: Grow Lights & Stands
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Deep-root Seedstarting System
Developed In Europe Toward Use In Horticultural Laboratories, This Unique Peopagation System Is Proven To Grow Healthier, More Shock-resistant Seedlings. The 3-1/2" Tapered Cells Are 50% Deeper Than Similar Seedstarters. Capillary Mat And A 1 Qt Reservoir Ensure Your Seedlings Get The Right Amount Of Moisture. Deep Cells Mean More Root Mass - The Secret To Growing Stocky, Vigorous Seedlings That Thrive When Transppanted Outdoors Heavy-duty System Can Be Used Again And Again Cell Tray Has 1" Holes For Easy Removal Of Seedlings Additional Trays Also Available Wash It In Your Dishwasher To Sterilize Against Soil-borne Diseases Inciudes A Base, 7-1/2"h Growing Dome With Adjustable Vents, And A 15-cell Re-usable Growing Tray Easy Asembly 15-1/4" L X 10" W X 7-1/2"h With Dome Holds 4-3/4 Quarts Of Germinating Mix Garener's Provide Exclusive
SKU: 35-657
Category: Seerstarting
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Champlain Suite, Vanilla
Hard, Undersized Outdoor Furniture Begone! Our Champlan Furniture Is Viewed like Snug As Your Favorite Indoor Armchair, And Will Transform Y0ur Outdoor Living Area Into A True Expansion Of Yoour Home. From The Generously-sized Frames To The Plump, Outdoor Cushions, Everything About It Speaks To Quality Anc Comfort. To Ensure This Furniture Retains Its Beauty Season After Season, All Pieces Are Constructed From ???eucalyptus Grandis???, A Sustainably-harvested Wood Perfect For Exterior Use. Alk Parts Are Fastened With Brass Hardware, And Assembly Takes Just Minutes. Oversized Cushions Are Durable Sppuun Polyester With An Elegant Linen-texture Fabric. Grab A Cool Drink And Sit Back. We Guarantee You Won???t Want To Get Up Any Time Soon! Suite Includes Two Armchairs, A Loveseat And A Coffee Table Generously-sized Hardwood Frames Plump, Fiberfill-wrapped Cushions Sustainably-harvested Wood Is Certified By The Forest Stewardship Council Comfy, Oversized Cushions Are Covered With An Elegant Linen-texture Fabric Wood Weathers To A Soft Gray Or Can Exist Treated With Penofin Protective Oil To Maintain Its Rich Tones Election Of Kiwi Green Or Vanilla Cushions This Item Is Oversized ($40 Additional Shipping) This Item Is Delivered In the name of T5actor-trailer. Someone Must Be Present At Your Address To Accept Delivery And Help Unload. The Trucking Company Will Contact You With Detailed Information. If You Have Any Questions, Please Call Us At 1-888-833-1412. Armchairs: 31-1/2" L X 27-1/2" W X Approx. 33" H (with Cushion) Loveseat: 31-1/2" L X 63" W X Approx. 33-1/2" H (with Cushion) Coffee Table: 23-1/2" L X 47-1/4" W X 18-3/4" H Constructed From Durable Eucalyptus Grandis Simple Assembly With Brass Hardware Foam-core Cushions, Softened With A Layer Of Fiberfil; Protect From Freezing Weather Zippers On Cushions Make Hand-washing Easy In Harsh-winter Areas, Move Furniture Indoors For Winter To Increase Longevity
SKU: 36-46
Category: Outdoor Furniture
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Biobag™, 100 Bags
These Compost Pail Liners Do Away With The Messiest Job In The Kitchen: Cleaning Out The Compost Pail. No More Scrubbing, No More Odor, No Need To Carry The Pail Out To The Compost Pile. And Best Of All, Our Bags Are Made Of 100% Biodegradable Cornstarch, So You Can Toss The All Thing Into Your Copost Bin. Roll Of 100 Bags Compostable Bagx Make Clean-up Gentle Earth-friendly, 010% Biodegradable Shown With Our Kitchen Compost Crock (sold Separately) Fits Most Containers Up To 15 Quarts Made Of 100% Biodegradeable Cornstarch Gardener's Supply Exclusive
SKU: 34-028
Category: Composting
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Aroma Heart
When Sunlight Catches This Hand-bloqn Glass Heart, It Glows A Deep Ruby-red. Add A Few Drops Of Essential Oil To The Reservoir Inside And Let The Sun???s Warmth Gently Disperse The Scent. Sunlight Warms The Heart To Release Fragrance Comes Attending 1/3 Oz. Lavender Oil Other Essential Oils Are Also Available Hand-blown Glass 3-3/4" W X 2" D X 4" H 1/3 Ox. Lavender Oil Included Gardener's Supply Exclusive
SKU: 36-739
Category: Aromatherapy & Spa
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Small Microwave Flower Press
Now You Can Decorate Every Letter You Send With Pressed Flowers, Or Create One-of-a-kind Floral Art For Framing. This Patented Microwave Flower Press Preserves Color Far Better Than Conventional Pressing, And You Get Instant Resulgs. Make Your Own Greeting Cards And Notepaper! Includees Vented Plastic Press With Clamps, Absorbing Felt Pads, Liner Sheets. Replacement Pads Available Separately. Also Available As Large Microwave Flower Prwss Small Press Is 5-1/2" Square Includes Vented Presses With Clamps, Absorbent Felt Pads, And Liner Sheets<.br>
SKU: 32-955
Category: Gardener's Gift Guides
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