Leko Light: Definition, Parts, Uses, and Setup Tips

Reading Time: 7 minutes

Published: January 19, 2026

Why crews say “leko”

On set, “Leko” is often shorthand for an ellipsoidal fixture, even when the unit is not labeled “Leko.” Some crews and rental lists prefer ERS or profile because those names are clearer in paperwork and less brand-specific.

If you want a quick reference for terms that overlap between lighting and grip, FilmDaft’s Glossary of Film Terms can help you avoid mix-ups like “gobo” meaning a template in a light versus “gobo” meaning a grip flag setup.

What a leko is designed to do

A leko is a control tool. You pick it when you need light with a boundary you can place exactly where you want it, then keep that boundary stable across takes.

• Cut spill fast with internal shutters, so the beam stays off walls, ceilings, and the lens.
• Create believable “sun hits” with hard, directional light that reads like it comes from a real source in the scene.
• Project a pattern (window panes, blinds, breakup) with a pattern gobo inside the fixture.
• Reach a specific area from far away when you cannot place a lamp close to the action.

How a Leko light works

Lekos behave more like a projector than a normal open-face light. The fixture forms an “image” at the gate, then the lens throws that shaped light onto your set.

The reflector, the gate, and the lens tube

The lamp or LED engine sits at the back, and an ellipsoidal reflector sends that light forward. The beam passes through a gate, where shutters and pattern templates sit, and then the lens tube projects the shaped beam onto the surface you are lighting.

This is why lekos feel exact. The shape is created inside the fixture, so the edge stays clean when you focus correctly.

Shutters, iris, and pattern gobos

Shutters are blades that slide into the beam at the gate. They let you cut the beam into rectangles, slits, or tight “slices” without building an external flag setup.

A key practical detail is the image flip. The optics invert the projection, so shutter cuts feel reversed. If you push the left shutter in, it cuts the right side of the projected beam.

A drop-in iris reduces the beam into a smaller circle. A pattern gobo is a metal or glass template that projects a specific pattern. If the pattern looks upside down, rotate the barrel or re-seat the gobo so the projection reads correctly on the wall.

Beam angle and throw distance

Lekos are often described by lens degrees like 19°, 26°, 36°, or 50°. In practice, that number tells you how wide the beam spreads. A smaller degree means a tighter beam, which makes it easier to hit a small area from farther away.

A tighter lens often looks “brighter” on the target because the same light is concentrated into a smaller area. It does not create extra light. It changes coverage, intensity on the surface, and how far the beam stays useful.

Color control: gels versus LED color modes

Many lekos you will see in rentals and theatres are tungsten units, so their default look is warm. Common tungsten lekos are often in the 500W to 750W range, which matters for heat, dimmers, and circuit planning.

If you need the beam to match daylight or a cooler practical, you can add a gel in the front frame. That works, but gels can fade, and they can deform if the fixture runs hot.

Newer LED lekos can change color without gels. You still need to test. LED drivers and color engines can shift tint as you dim, and some units show flicker at certain frame rates. FilmDaft’s guides on color temperature and CRI can help you keep those checks simple and repeatable.

Where a leko fits in film production

Lekos come from stage lighting. They show up in film work any time you need precise light that behaves the same from take to take. A common reference point is the ETC Source Four style of ellipsoidal, which is widely used in theatres and rental inventories.

Lekos also fit naturally into source-based lighting. If the scene has a believable source like a window, a door crack, or a strong practical, a leko can create a hard beam that supports that logic. FilmDaft’s motivated lighting guide is a good companion when you want your cuts and patterns to feel justified in the scene.

When a leko is a smart choice

Pick a leko when clean edges and controlled spill matter more than softness. If you keep fighting light that lands in the wrong place, a leko can be the faster tool.

• Window and blind patterns that need to land in a specific spot, with edges that you can line up to the frame.
• Doorway and hallway control where you must keep the light off nearby walls and ceilings.
• Repeatable accents that need to match across coverage, even after small blocking changes.
• Long throws when the fixture must live far from set, but the lit area must stay tight.

When a leko is unnecessary

Lekos are not a default key light. If the scene needs a soft, wrapping key or a fast, broad wash, other tools usually get you there with fewer steps.

If you want a soft key on a face, start with a larger source and control it with flags and negative fill. FilmDaft’s book lighting guide is a clear example of a soft workflow that stays controllable without turning your key into a hard spotlight.

You can soften the edge of a leko with focus and diffusion. The source still stays small compared to a bounced or diffused setup. If the goal is wrap on skin, pick a larger source first, then add the leko as an accent when the shot needs a hard hit or a pattern.

A practical setup workflow

Lekos are quick when you follow a consistent order. The goal is to solve the big decisions first, then use shutters, rotation, and focus for the final polish.

Choose the lens and placement first

Start by picking the lens degree that matches your throw distance and target size. If the beam feels too wide, swapping the degree usually fixes the problem faster than nudging the stand over and over.

Place the fixture where it can hold the angle through the scene. A leko that keeps the same direction across coverage is easier to match than a leko that keeps getting moved for each shot.

Rig solidly, then rough aim

Rig the unit so it will not drift. Once it is safe and stable, rough aim the hotspot onto the general area before you touch shutters and patterns.

If you are using a stand setup, FilmDaft’s C-stand guide is a useful refresher on how stands, grip arms, and sandbags work together.

Cut the beam with shutters

Use shutters to remove spill light first. Cut the beam off ceilings, walls, and shiny surfaces that can bounce light back into the shot.

Remember the reversal. The projected image is inverted, so your left shutter cuts the right side of the beam, and your right shutter cuts the left.

Add a pattern gobo when the scene needs it

Insert the pattern template at the gate and rotate the barrel to line it up with the set. Window gobos and blind patterns look best when they land on a surface with enough texture to catch the shape without turning into a flat sticker.

Do a camera check after you set the pattern. A small pan or a blocking change can move the pattern onto skin, which often reads like a mistake unless that look is part of the shot.

Set focus for the edge you want

A hard shutter edge reads like sun, a projector, or a strong exterior source. A slightly softened edge often reads more natural indoors, even when the light is still clearly directional.

Pick the edge quality, then lock it. Tiny focus changes can make a window pattern feel wrong fast.

Use a bounce when the fixture cannot go where you need it

If you cannot run a lamp into a tight space, you can aim the leko into a bounce surface that is placed where the lamp cannot be. The leko gives you a narrow, controlled beam onto the bounce, and the bounce returns a controlled pool of light into the scene.

This works well when you keep the bounce area small and stable, then flag the bounce like any other source so it does not spill everywhere.

Match color, then test for flicker

Match the leko’s color to the scene before you fine-tune exposure. If the beam is tungsten and the scene is daylight, you can correct with gels, correct with camera white balance, or switch to a fixture that matches the target color more directly.

If the unit is LED, record a short test at your intended frame rate and shutter. Review the clip for banding or pulsing before you commit to the setup.

Common misunderstandings and misuses

Most leko problems come from unclear vocabulary or unclear expectations. Once you know what the fixture is built to do, the fixes become straightforward.

“Gobo” can mean a template or a grip tool

Some crews say “gobo” and mean the pattern template inside the light. Other crews say “gobo” and mean a go-between flag setup, like a grip arm with a cutter. When you need projection, say “pattern gobo” or “template” so the right gear shows up.

Shutter cuts feel backwards the first time

The optics invert the projection. If you are new to lekos, that reversal can make you think you rigged it wrong. You just need the habit that the shutter you move is not the side that gets cut on the wall.

Treating a leko like a Fresnel

A Fresnel is built for smooth flood and spot control and a different shadow character. A leko is built for internal cuts and projection. If you need a soft-edged wash that you can widen quickly, a leko is usually the slower choice.

Skipping camera checks for patterns and spill

Patterns can land on faces, shimmer on fine textures, or create distracting highlights on glass and polished surfaces. A quick camera check after shuttering and pattern setup usually saves time later.

If you want more FilmDaft lighting fundamentals around this topic, start with the Lighting section and keep color temperature in mind while you plan gels, LED modes, and white balance.

Summing Up

A leko light is an ellipsoidal spotlight built for precision. It lets you cut the beam with internal shutters, control size and throw with lens degrees, and project patterns with a pattern gobo. Use it when you need clean edges, tight control, or a repeatable “sun hit” that supports motivated lighting. Skip it when you need soft wrap or wide coverage, then bring it back as an accent when the shot needs a hard, controlled shape.