Koto™

Build your Koto downlight

Pick what matters most to you, in any order. We show what that leaves, and the exact items to order with the spec sheet.

How Koto works ↓Compare families ↓

Where it’s going

Decides the housing, or no housing

Install

Anything special about the ceiling?

Insulation above the ceiling

Wet location?

How is it controlled?

Size

The opening you see in the ceiling

The light

How much, what color, how wide · Ceiling heights are a rough guide for ordinary room light: kitchens, bathrooms and offices need more light than living rooms and hallways at the same height.

Output

Color temperature

Beam

The look

Trim, shape and finish

Trim or trimless?

Shape

Does it need to aim?

Style

Finish

Shape or soften the light

Optional · clips onto the module

Extras

Emergency battery backup

How Koto works

You choose three parts. The family sets what the first part is and which options the other two offer.

Housing, or no housing
Goes above the ceiling and holds everything. Pick it by the job: new construction, remodel, shallow joists, fire-rated ceilings. Canless Koto skips the housing and mounts right in the cutout.
Housing product number builder →
Light module
The LED engine. This is where you choose how much light (lumens), what color (color temperature) and how wide (beam lens).
Module product number builder →
Trim
What you see in the ceiling. Round or square, then the style (reflector, baffle, trimless, adjustable, pinhole, wall wash) and the finish.
Trim product number builder →

Change your mind later. Koto is modular: trims, lenses and outputs swap without changing the housing. A 38° module ships with 25° and 60° lenses in the box.

Compare all Koto families

Lumens are drawn to scale. Click a family to highlight it; the family your downlight uses is highlighted.

Family	Best for	Install	Lumens	Power	Dimming
	The smallest opening, for accents and tight spaces	New construction	850–1,000 lm	120V	Triac/ELV · dim-to-warm module
Your downlight	Everyday downlight with the most module options	New construction · 4″ sloped-ceiling version	350–1,350 lm	120V	Triac/ELV · dim-to-warm modules
	No housing: tight ceilings and remodels	New construction or existing ceiling; no housing	950 lm	120–277V	0-10V, Triac/ELV · dim-to-warm & Human Centric modules
	Commercial jobs; extra dimming and EM options	New construction	850–1,850 lm	120–277V	0-10V, Triac/ELV
	High ceilings and big rooms, up to 3,500 lm	No housing: new construction frame, or remodel up to 2,500 lm	750–3,500 lm	120–277V	0-10V, Triac/ELV, DALI-2, Lutron Athena
	Jobs on DALI-2 digital controls	New construction	880–1,000 lm	120–277V	0-10V, Triac/ELV, DALI-2
	Turns old 4–8″ cans into 2–4″ Koto	Inside an existing 4–8″ can	350–1,350 lm	120V	Triac/ELV · takes every Standard module, incl. dim-to-warm
	Upgrades low-voltage MR16 cans	Existing low-voltage MR16 housing	800 lm	12V AC	Dims on electronic or magnetic 12V transformers · dim-to-warm module
	Adjust color temperature after install	New construction	1,000–1,250 lm	120–277V (driver in housing)	0-10V and DALI-2
	Power and control over Ethernet	New construction, PoE network	800 lm	24V DC (PoE)	Depends on the 24V DC power supply / transformer
View family →	Aimable up to 90°	—	1,000 lm	120V	Triac/ELV, dims down to 1%

Ranges cover every size in the family. Exact options for each size are in its product number builder.

What you choose on the module

The same three choices in every family. Which values you can pick depends on the family; the builder only shows what goes together.

How much light · lumens

Lumens is the light you get; watts is the power it uses. Every Koto output, grouped where values sit within about 150 lm:

350 lmStandard · Downsizer
750–900 lmStandard · Downsizer · Mini · Architectural · Max · DX · 12V AC Retrofit · 24V DC PoE
950–1,000 lmStandard · Downsizer · Mini · Canless · Architectural · Max · DX · Tunable White
1,100–1,150 lmStandard · Downsizer · Architectural
1,250–1,350 lmStandard · Downsizer · Architectural · Max · Tunable White
1,400–1,500 lmArchitectural · Max
1,650 lmArchitectural
1,850 lmArchitectural
2,000 lmMax
2,500 lmMax
3,000 lmMax
3,500 lmMax

Nominal outputs. Standard modules also fit Downsizer. Architectural (850–1,850 lm) and Max (750–3,500 lm) also cover the lower outputs: in Architectural the module and housing set the output together, in Max the frame sets it.

Narrow Spot, Focus and 5-CCT modules are in the Module product number builder.

What color · color temperature

Lower numbers are warmer. Dim-to-warm and switchable options are on select modules.

2400K
Very warm
2700K
Warm
3000K
Soft white
3500K
Neutral
4000K
Cool
Sunset
Dims 3000K → 1800K
Human Centric
Dims 4000K → 2200K
5-CCT Switch
2700K–5000K, set on site

How wide · beam

Set by a lens in the module and swappable in the field. Narrow for art and tall ceilings, wide for even room light.

10°
Narrow Spot
18°
Spot
25°
Narrow flood
38°
Standard
60°
Wide
90°
Frosted, extra wide
18°–50°
Focus: twist to adjust

Words you'll see on spec sheets

Triac / ELV: Works with regular wall dimmers on 120V. Most homes.
0-10V: A separate pair of low-voltage dimming wires. Common on commercial jobs, usually with 120–277V power.
DALI-2: Digital control. Each light can be addressed and grouped from the control system.
IC airtight (ICA): The housing can touch insulation and limits air leaking into the attic. In ELCO item numbers it's the "ICA".
Canless: No housing. The light mounts straight in the ceiling cutout, which suits remodels.
Driver: Turns line power into what the LED needs. Koto families put it on the module, the frame or the housing.
Aperture: The nominal size of the opening you see in the ceiling: 1″ to 6″ on Koto. Exact cutout sizes are on each spec sheet.
Trimless: No trim ring: the trim sits flush with the ceiling. It needs a spackle frame (drywall) or a wood ceiling ring (millwork) at install.
Shallow housing: 3½″ tall, for tight joist space. Takes only trims marked S.

Questions we hear a lot

What's the difference between Standard and Architectural?

Standard runs on 120V with a regular wall dimmer, has the driver on the module and goes from 350 to 1,400 lm. Architectural takes 120–277V and 0-10V or Triac/ELV dimming, keeps the driver on the housing, goes up to 1,950 lm and adds extra dimming and emergency options. Homes usually get Standard; commercial jobs usually get Architectural.

Canless or a housing?

If the ceiling is already closed, Canless saves you from working above it: it mounts in the cutout and gives 950 lm with 0-10V or Triac/ELV dimming. If the ceiling is open, a housing gives you every family and more output, up to 3,500 lm with Max.

I'm replacing old 5″ or 6″ cans. Do they have to come out?

No. The Koto Downsizer fits inside an existing 4–8″ can and turns it into a 2–4″ Koto. Low-voltage MR16 cans can take the 12V AC Retrofit instead.

Can I change the beam or color after it's installed?

Beam, yes: lenses swap in the field, and 38° modules ship with 25° and 60° lenses. Color is set by the module, so changing it means a new module, unless you pick a 5-CCT Switch module or Tunable White.

My joists are tight. What fits?

Shallow 4″ housings are 3½″ tall, in new construction and remodel versions. They take only trims marked S. Canless is another option where there's no room for a housing.

What about fire-rated ceilings and emergency backup?

For 2-hour fire-rated ceilings there's a 2-Hr fire-rated 4″ housing and the EJB junction-box housings, which take the trims listed as compatible with them. Most 4″ housings take a 90-minute battery pack (-EM5); the Max. Adjustability housing also takes one serviced from below (-EM7).

Still not sure which Koto?

Tell us the ceiling, the controls and the look you're after, and we'll pick it with you.

Use this · 3 items

See the list ↑

EL485ICA + ELK0930 + ELK4118W