The green banker's lamp: how to tell an Emeralite from the $46 copy

By Matthew Partsch · Owl and Twig Vintage · September 13, 2026

Harrison D. McFaddin got his design patent on the green shade on May 11, 1909, and it ran fourteen years. He did not register the word EMERALITE until July 1921. By the time that registration issued, the patent had fifteen months left to live. Almost everything about the banker's lamp market follows from those two dates.

What a banker's lamp actually is

A banker's lamp is a brass stand carrying a rectangular hood of green glass, open at the bottom and open at the back, with a pull chain and a shade that tilts. The hood is the entire idea. It throws light down onto the page and keeps the bulb out of the line of sight of the person reading, and of everyone else in the room, which is why it turned up on rows of desks in banks, libraries, newsrooms and insurance offices rather than in parlors.

What almost nobody calls it is the name it was sold under. Banker's lamp is a nickname the public applied later. The product was an Emeralite, a word McFaddin built out of emerald and light, and for the first decade and a half of the form's life the two terms were effectively the same thing. Everything since has been a copy of a specific commercial product, which is why this guide is about a brand rather than a category.

One practical note before the history. Because the shade is a green filter rather than a white one, the bulb inside it changes the object more than it changes most lamps. A warm filament bulb reads amber-green through cased glass; a cool LED reads almost aquarium blue. That is the same argument we made about the bulb being half the fixture, and it matters more here than anywhere else in the house.

Who made the first one, and when

Harrison D. McFaddin filed a design patent application for a lamp shade on February 23, 1909. It was granted on May 11, 1909 as D39,984, with a single claim that reads, in full: The ornamental design for a lamp shade, as shown. The patent record gives the term as fourteen years.

He sold it through H. G. McFaddin and Company, Inc. of 324 Fifth Avenue, New York, between 32nd and 33rd Streets. The firm's own catalog describes it as lighting specialists since 1874, which puts the company a generation older than the lamp that made it famous. The trademark file, when it was finally opened twelve years later, claims first use of the name in commerce in May 1909, the same month the patent issued. They were selling from day one.

The glass is the part that came from somewhere else. The standing collector reference holds that the shades were made at the works of J. Schreiber and Neffen at Rapotin, in Moravia, in what is now the Czech Republic, and that the metal bases were made in the United States. That account is careful to say it is believed rather than documented, and we repeat it on the same terms. It is the best available reconstruction, not a proven fact, and auction houses have since adopted it as if it were settled.

The company outlived its founder's control of it. It was reportedly bought around 1939 by Charles Inness Brown and renamed The Emeralite Co., Inc., sold again in 1960 and renamed Tilarem, Inc., and legally dissolved in 1962. The trademark, remarkably, stayed on the federal register for another twenty years after the company that owned it stopped existing. It finally expired on May 7, 1982.

The patent expired before the name registered

Here is the whole story of this market in three dates, all of them from federal records rather than from collectors.

Date	Event	Record
May 11, 1909	Design patent on the shade granted, fourteen-year term	US D39,984
July 23, 1921	Application to register the word EMERALITE filed, twelve years and two months later	Serial 71150875
February 7, 1922	Trademark registered, fifteen months before the patent lapsed	Reg. 0151538
May 11, 1923	Design patent expires. The shape enters the public domain	Term of D39,984

Read those in order and the competitive history stops being a mystery. For twelve years McFaddin held a monopoly on the one thing that could not survive a monopoly ending, and held no registered claim at all on the one thing that could last forever. He protected the shape, which was always going to become free, and left the word unprotected, which was the asset that could have run indefinitely. By the time he corrected it, the correction had fifteen months of overlap with the patent and then had to carry the business alone.

So Greenalite, Verdelite and Amronlite are not a story about copycats. After May 1923 the green hooded shade belonged to everybody, and rival manufacturers were free to build it, which they did, under names deliberately built on the same suffix. They were competing legally with a product whose protection had run out on schedule.

How to tell a real Emeralite

Work the glass first and the marks last, for the same reason we argue it about vintage decor generally: a mark is the easiest thing on the object to add, and the construction is the hardest thing to fake cheaply.

• Look for two layers of glass at any edge. This is the test, and it comes from the manufacturer rather than from a forum. McFaddin's 1935 catalog states that the reflectors are lined with white opal glass. That is cased glass: a green layer over a white layer, fused, not painted. At a chip, at the ground rim, or along the open back edge, you should be able to see the sandwich. Green all the way through is wrong. Green over clear is wrong.
• Try to scratch the green in an inconspicuous spot. The catalog boasts that the reflectors do not tarnish from heat or dampness, can be easily washed, and retain efficiency a lifetime. That boast only works because the color is in the glass. If the green lifts, flakes or wipes, you are holding a painted shade, and painted shades are a modern economy.
• Find the plate on the base. Collectors and auction catalogs consistently describe a small metal plate on the upper part of the base near the shade, carrying the Emeralite logo and the series number. One catalogued example reads: PAT. Aug. 15, 1916. MADE BY H.G. MCFADDIN CO, NEW YORK.
• Find the mark on the shade, then forgive its absence. Originals carried either a decal, described as a beige or yellow ground with a red circle and the name in green, or an ink stamp, either of which may sit inside or outside and may include the series number and a country. Both are surface applications on a lamp that got handled every working day for decades. A missing shade mark is common and proves nothing on its own.
• Check that the shade fitting matches the series. A 4378 shade is pierced through the sides. An 8734 shade is not pierced at all; its back edge curves inward to seat in the holder. A pierced shade sitting on a channel holder, or the reverse, means the two halves did not leave the factory together.
• Pull the chain. Original switching is a pull chain out of the socket. A rocker, a toggle or an inline cord switch means the lamp has been apart, which is not fatal on a hundred-year-old fixture but is worth knowing before you pay for originality.

How to date a shade by its country mark

If the shade does carry a country of origin, it hands you a hard date bracket, and the reason is geopolitical rather than horticultural. Rapotin sat in Moravia, which was part of Austria-Hungary until the Czechoslovak declaration of independence in October 1918 and part of Czechoslovakia thereafter. The glassworks did not move. The country around it did.

Two pieces of American customs law make the mark reliable enough to use. The McKinley Tariff Act of 1890, in force from 1891, required imported articles to be marked with their country of origin. A 1914 amendment required the phrase to be in English and to use the words made in. So the marking is not decoration, it is compliance, and it tracks the calendar.

What the shade says	What it means
Austria	Cannot postdate 1918. Puts the shade in the 4378 era or the very start of the 8734 run.
Czechoslovakia, or Made in Czechoslovakia	Cannot predate late 1918. Consistent with the main 8734 run of the 1920s.
No country at all	Inconclusive, and extremely common. Decals and ink stamps wore off. Do not read an absent mark as evidence of anything.
Made in USA	Later production, after the company moved away from imported Bohemian glass. Also the marking on many modern reproductions, which is not the same thing.

This is exactly the same discipline as reading a copyright page. You are not identifying the object from its appearance. You are reading a piece of bureaucratic compliance that the maker had no reason to falsify and every reason to get right.

The look-alikes, and who made them

The important thing about this table is that only the last row is a reproduction. The others are period lamps from real manufacturers competing in a market where the patent had run out, and several of them are excellent objects. This is the same situation as L. and J.G. Stickley against Gustav: a different maker is not a fake, it is a different maker.

What it is	How it fools you	The tell
Verdelite	Period, cased green glass, same silhouette, and the suffix is doing its best to sound like Emeralite.	Its own name on the plate. Genuine antique lighting, and it generally sells for less than Emeralite for no reason other than the name.
Greenalite	Same again, and the least commonly seen of the three.	Its own marks. Scarcity does not translate into a premium here, because the collector base follows the famous name.
Amronlite	Period, cased shade, frequently very well made.	Dealers attribute it to the Faries Manufacturing Company of Decatur, Illinois. We have not confirmed that attribution against a company record, so treat the maker as trade opinion and the lamp as genuinely period.
Bellova	It is a McFaddin product, so the company name checks out.	Bellova is the firm's art glass line, reportedly introduced in February 1923, not the green banker's shade. A Bellova shade on a banker's base is a McFaddin lamp but not the lamp the buyer thinks it is.
The modern reproduction	Identical outline, brass-tone finish, green shade, pull chain, and nobody is hiding anything. It is sold openly as a desk lamp.	Single-layer glass with no white opal lining, no maker's plate on the base, modern cord and plug, and a shade cut to a standard commercial size of about 8.85 inches. Retail is $46.80.

What Emeralite lamps actually sell for

This is the honest and slightly awkward part. The published realized record for Emeralite is thin, and where it exists it is well below what the lamps are asked for. We are going to show both, labeled, rather than blending them into one comfortable number.

Prices actually realized at auction

Lot	Sale	Estimate	Result
Three banker's desk lamps, two marked Emeralite No. 8734, cased green shades, corrosion to bases, otherwise good	Brunk Auctions, Asheville, July 2016	$100–400	$400 for the group
Emeralite model 8734TW, c. 1916, slight chip to the shade, original felt and wiring, brass with oxidation	North American Auction Co., Bozeman, March 2023	$1,000–2,000	Sold; price not published
Pair of H. G. McFaddin Emeralite banker's desk lamps, square bases, one with adjustable head	Auctions at Showplace, New York, August 2024	$400–600	Sold; price not published

Prices asked, which is a different number

What	Asking
Complete Emeralite lamp, design trade retail, average	$923
Same, the low end of that market	$602
Same, the high end	$2,400
Original Emeralite shade alone, no base	about $200
Modern replacement shade sized to fit	$23.68–$23.99
Complete new reproduction lamp, big-box retail	$46.80

The practical read: a complete, correctly married, marked 8734 in sound brass is a few hundred dollars when it crosses an auction block and roughly a thousand when it sits in a design showroom. If you are buying at an estate sale, a flea market or a general online listing, the auction number is the one that reflects what the thing is worth, not the showroom number. Sellers quote the showroom number constantly, because it is the easiest one to find.

What it cost new

The 1935 catalog prices four ten-inch models: B.8750 at $14.00, Z.8750 at $15.00, 0890.8750 at $16.25 and 0861.8750 at $16.50. By standard consumer-price conversion that is somewhere in the region of $330 to $390 in 2026 money, which we offer as an approximation rather than a figure to quote.

Which produces the tidiest fact in this guide. The Emeralite cost roughly three to four hundred dollars new in the middle of the Depression. Ninety years later, a good original still brings roughly three to four hundred dollars at auction, and the copy of it costs about a tenth of that. The lamp has held its value almost exactly, in real terms, by doing nothing at all.

What to check before you buy

• Run a fingernail or a loupe along the open back edge of the shade and confirm you can see a white layer under the green.
• Test the green for scratchability somewhere it will not show.
• Read the plate on the base, and photograph it square and in daylight before you decide anything.
• Confirm the shade fitting matches the series the plate claims: pierced sides for 4378, an inward-curving back edge for 8734.
• Look for a country name on the shade and use it as a date bracket, but do not treat its absence as a problem.
• Check that the shade sits in its holder without packing, shims or tape.
• Confirm the switch is a pull chain out of the socket, and budget for rewiring regardless, because hundred-year-old cloth cord is not something to plug in.
• Compare the wear on the brass with the wear on the glass. A pristine shade on a heavily rubbed base is the shape a marriage takes.
• Price it against realized auction results, not against design trade asking prices.

If you are buying the brass rather than the glass, the magnet test and its limits apply here as everywhere: most Emeralite bases are brass-finished cast metal rather than solid brass, and the finish is part of the object's history rather than a defect to be polished off.

Nature's predominating color

The 1935 catalog is not shy. Emeralite green, it says, is nature's predominating color, and best for eyes. The reflectors are claimed to be fifty percent more efficient than other types on sight-meter tests. The lamp is described, without apparent irony, as not just a lamp but rather a service to sight. The customer list runs Columbia, Harvard, General Motors, Westinghouse, Standard Oil, Ford and Bell Telephone, plus, the catalog says, more than 250,000 individuals.

The central claim appears to be wrong. Asked about the green-is-good-for-eyes argument, a modern ophthalmologist at Massachusetts Eye and Ear put it plainly: there is no evidence it is any better. What the shade does well it does by being opaque and hooded, not by being green. The color was a decision about how the thing should look and feel, dressed up for seventy years as optics.

And it worked anyway. The green banker's lamp is now shorthand, in film and on television and in every stock photograph of a library, for a particular kind of concentration: quiet, unhurried, slightly institutional, somebody working late over paper. That is an enormous amount of cultural work for a hood of glass whose patent ran out in 1923.

McFaddin protected the shape and let the name go unregistered for twelve years. The shape escaped into the public domain on schedule and became a $46.80 commodity. The name, registered almost as an afterthought, is the thing still worth paying for. If you find one with two layers of glass at the edge and a plate on the base, you have the original of an object that several million people can picture without ever having owned one.