An eight-foot ceiling gives a dining pendant about thirty inches to work with. Subtract the table, subtract the clear air you need above it, and that is the whole budget. A globe eats most of it. A saucer eats a third, and spends the rest on width.
That single trade is the reason the 21A and 15A exist as a pair, and the reason they outperform almost everything else under a normal ceiling.
The ceiling arithmetic first
Take a standard US dining room: 96 inches of ceiling, a 30-inch table, and the 30–36 inches of clear space you need between the tabletop and the bottom of the shade so people are not staring into a bulb. Working with the tighter end:
| Line item | Inches |
|---|---|
| Ceiling | 96 |
| Minus tabletop | −30 |
| Minus clear air | −36 |
| Left for the shade plus its drop | 30 |
Thirty inches is not much. What you do with it decides whether the lamp looks hung or crammed.
The number that ranks every pendant: width divided by depth
A pendant costs you vertical space equal to its depth, and buys you horizontal coverage equal to its diameter. Divide one by the other and you get the efficiency of the trade — how many inches of coverage each inch of depth is worth.
| Shade | Diameter | Depth | Coverage per inch of depth |
|---|---|---|---|
| 15A | 34.5 in (87.6 cm) | 13 in (33 cm) | 2.65 |
| 21A | 25.3 in (64 cm) | 10.8 in (27.3 cm) | 2.34 |
| 26A | 17.5 in (44.5 cm) | 9.8 in (24.8 cm) | 1.79 |
| Buoy | 21.7 in (55 cm) | 22.4 in (57 cm) | 0.97 |
| 10A (globe) | 21 in (53 cm) | 21 in (53 cm) | 1.00 |
A true sphere scores 1.00 by definition — its depth equals its diameter. The 21A scores 2.34, which means it delivers more than twice the width for the same vertical cost. The 15A extends that to 2.65.
Put it back into the ceiling budget: the 21A's 10.8-inch depth leaves 19.2 inches of drop, so the shade hangs at a natural height. A 21-inch globe in the same room leaves 9 inches of drop — the lamp ends up jammed against the ceiling with its bottom edge too high to light the table properly.
Why a flat disc behaves differently from a sphere
A globe lights in every direction equally. Half its output goes up, into a ceiling nobody is looking at. The other half comes down and sideways, and because the source is roughly a point at the centre, you get a bright band at the widest point and a dimmer pool underneath.
A saucer concentrates downward. The paper is stretched across a shallow dome, so almost the whole surface faces the table. The light leaves the shade at a gentle angle rather than outward, which is why a 21A at 20 watts reads brighter over a dining table than a globe of the same wattage twice its depth.
And it stays out of the sightline. Ten inches of depth at seated height means the shade occupies a thin band, not a hanging object. In a room where people sit across from each other, that is the difference between a lamp you notice once and a lamp you keep ducking under.
Why they are sold and hung as a pair
The 21A and 15A share a shape but differ by a factor of about 1.4 in diameter. Hung together at different heights, the smaller sits lower and closer to the table, the larger rides above and behind it. The result is two layers of light instead of one flat wash — the same principle as layering a floor lamp and a table lamp in a corner.
Practical spacing that works:
· Vertical gap: 10–14 in (25–36 cm) between the bottom edge of the upper shade and the top of the lower one. Closer than 10 in and they read as one object; farther than 14 in and the layering stops being legible.
· Horizontal offset: set the centres 8–12 in (20–30 cm) apart so the lower shade sits partly under the upper one's edge. Directly stacked hides the top shade; fully separated loses the pairing.
· Over a table: the lower shade (typically the 21A) sets the clearance — 30–36 in (76–91 cm) above the tabletop. The 15A then sits above it.
· Ceiling height: with both shades you need at least 10 ft (3 m) to stack them comfortably. At 8–9 ft, use one saucer on its own — the 21A — and keep the pair idea for a taller room.
Which one, if you are buying a single shade
| Room | Choose | Why |
|---|---|---|
| Dining table for 4–6, 8–9 ft ceiling | 21A alone | 25.3 in covers a 40–48 in table at roughly half to two-thirds of its width, and leaves 19 in of drop. |
| Long table, 8–10 seats | 15A alone | 34.5 in of coverage; the shallow depth still clears a standard ceiling. |
| Double-height void or 10 ft+ | 21A + 15A as a pair | Enough vertical room to stack them with a 10–14 in gap. |
| Kitchen island, low ceiling | 21A | Wide enough to light a counter, shallow enough to keep headroom over a worktop. |
Prices and what the versions change
Both models come in three craft levels. The Value edition ships as a pair of lanterns — two shades on one order — which is why its price looks close to the Classic single.
| Model | Value | Classic | Mastercraft |
|---|---|---|---|
| 21A (25.3 in) | $235 (pair) | $275 | $490 |
| 15A (34.5 in) | $455 (pair) | $655 | $990 |
The step from Classic to Mastercraft is the joinery: ribs seated in hidden connectors versus ribs tied by hand. On a shallow saucer that matters less than on a tall globe, because the shade carries less of its own weight — but it is still the line that decides whether the disc stays flat in year ten.
Frequently asked
Will a 21A work on an 8 ft ceiling?
Yes — this is its best case. Its 10.8-inch depth leaves roughly 19 inches of drop within the 30-inch budget a standard dining room allows, so it hangs at a proper height instead of being pushed up against the ceiling.
Do I need both the 21A and the 15A?
Only if you have 10 ft (3 m) or more of ceiling and want layered light. On a standard ceiling, one saucer does the job better than two crammed together.
Why does the Value edition cost about the same as the Classic?
Because it ships as a pair of lanterns rather than one. Check the variant description before comparing — you are looking at two shades, not one.
Hardwired or plug-in?
Both shades ship with a hardwire kit; a plug-in cord is available if there is no ceiling point. The 79 in (200 cm) length suits most rooms, and we can build a different length if you tell us when ordering.
Is a saucer hard to keep clean?
Easier than a globe, because there is no deep interior to reach into. The open base lets you dust the inside with a soft brush without touching the paper. Never use a damp cloth — water marks washi permanently.
Can you make a different diameter?
Yes. We are a workshop, so a different width is a build instruction rather than a new product line. Tell us the diameter and drop your ceiling allows. We are an independent studio, not affiliated with the Noguchi Museum.
Measure the drop before you measure the shade.
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