Halcyon Reserve

Vesper · Model HN–01 · Bedside instrument

Rest, held toa tolerance.

Vesper shapes the light and sound of a bedroom across eight hours. It lowers the evening, holds the dark, then returns the morning slowly, the way a sky does. One dial. No screen. Nothing to check.

Reserve edition one

$2,900 · Ships from October

Light
2,700 → 1,800 K, then dark
Sound
Tuned to the room, 31 dB
Interface
One dial, 48 detents
Edition
1,400, signed & serialised

01 — The name

Calm days, each winter

The Greeks had a word for the calm that arrives exactly when it is needed.

Alcyone, grieving a husband lost at sea, was turned by the gods into a kingfisher. So that she could nest on the open water, her father Aeolus held back the winds for fourteen days every winter. Sailors called them the halcyon days: a stillness that was made, not found.

We took the name as a brief. Sleep cannot be bought, and anyone who promises otherwise is selling something. But the conditions for it can be built, precisely and to last: a dark that arrives gradually rather than at the flick of a switch; a sound that covers the street without becoming one more thing to listen to; a dawn that wakes the body before an alarm has to.

Halcyon was founded in Edinburgh in 2021 by an acoustic engineer and a lighting designer who had spent their careers making concert halls and museum galleries behave. Vesper is what they made for the smallest room they had ever worked on. It took four years. It is meant to stay on your bedside table for twenty.

02 — The night

One night, in three movements.

  1. I · 22:00 – 23:30

    Descent

    Light falls from 2,700 to 1,800 kelvin, then below the threshold of the eye. A bed of brown noise rises to meet the room, shaped on setup to its measured acoustics.

  2. II · 23:30 – 06:10

    The still

    Darkness, held. Sound settles to 31 decibels and moves on an eleven-second swell, close to a sleeping breath. Nothing blinks. Nothing glows.

  3. III · 06:10 – 07:00

    Return

    Fifty minutes of dawn, from ember to 4,000 kelvin daylight. The sound thins to nothing before you open your eyes.

Time
22:00
Light
2,700 K
Sound
38 dB

03 — Anatomy

Five parts, each made by people who make only that.

Exploded technical drawing of Vesper showing, from top: glass diffuser, dial ring, aluminium body, linen grille and walnut foot, aligned on a central axis. 01 02 03 04 05 Ø 168 MM
Fig. 1 — Vesper, exploded along its axis. Not to scale.
  1. 01

    The diffuser

    Borosilicate glass, mouth-blown and acid-etched on the inside to a 0.4 mm frost. Light leaves it without a hotspot from any angle on the pillow.

    Borosilicate 3.3 · 2.2 mm wall

  2. 02

    The dial

    A knurled ring with 48 detents, damped with the viscous grease used in cine lenses. Turn to dim, press to begin the night. That is the entire interface.

    Stainless 316L · 0.22 N·m

  3. 03

    The body

    Turned over four hours from a single billet of aluminium, bead-blasted, then anodised a graphite that reads warm at night and cool by day.

    6082-T6 · Wall 3 mm · No visible fixings

  4. 04

    The grille

    Undyed Belgian linen over a sealed chamber and a 50 mm full-range driver, voiced for listening quietly rather than loudly.

    0.9 L chamber · 24 – 64 dB

  5. 05

    The foot

    Solid black walnut, hand-oiled, with your instrument’s serial cut into the underside and signed by the person who tuned it.

    Juglans nigra · Felted base

04 — Restraint

What it will never do.

The bedroom is the last room most of us have not handed over. Vesper is defined as much by what it leaves out.

  1. No screen.

    No glow to check, no number to worry at three in the morning. The dial tells you everything by feel.

  2. No microphone.

    It cannot listen, because there is nothing to listen with. Not switched off: absent from the board.

  3. No account.

    Set up on the instrument itself in under a minute. Your nights stay in your room and are never data.

  4. No subscription.

    Everything it does on the first night, it will still do on the four-thousandth, at no further cost.

  5. No planned end.

    Firmware supported to 2036, a published parts list, and a workshop that repairs by hand.

05 — Atelier

Three workshops. One bench. One signature.

The aluminium is turned in Sheffield, a city that has worked metal for four hundred years. The glass is blown in Nový Bor, where it has been blown since the fourteenth century. Each instrument is then assembled, tuned and listened to in a quiet room in Edinburgh, by one person, who signs the foot beside the serial.

“We spent eleven months on the feel of the dial. You touch it once a night, in the dark, half asleep. That is exactly why it has to be right.”

Isla Marr — Co-founder, acoustics

  1. 55.953° N 3.188° W

    Edinburgh

    Design, tuning and final assembly

  2. 53.389° N 1.473° W

    Sheffield

    Turning and anodising, Kelham Island

  3. 50.758° N 14.555° E

    Nový Bor

    Mouth-blown and etched glass

  • Aluminium 6082, graphite

  • Black walnut, hand-oiled

  • Belgian linen, undyed

  • Borosilicate, etched 0.4 mm

06 — Edition one

Vesper

$2,900

The first edition is limited to 1,400 instruments. A $300 deposit holds yours; the balance is due when it leaves Edinburgh, and the deposit is refundable in full at any point before then.

Reserve with a deposit

Thirty nights at home. If it is not for you, we collect it.

Dimensions
Ø 168 mm × 212 mm. 2.4 kg.
Light
0 – 420 lumens, 1,800 – 4,000 K. CRI 97. Flicker-free at every level.
Sound
50 mm full-range driver, sealed 0.9 L chamber. 24 – 64 dB.
Interface
One dial, 48 detents. Turn to adjust, press to begin the night.
Sensors
Ambient light only. No microphone, no camera, no motion tracking.
Connectivity
None required. Bluetooth LE for scheduling, off until you turn it on.
Power
USB-C, 18 W. Woven cotton cable, 2.5 m.
Warranty
Ten years, parts and labour. Firmware supported to 2036.