Studio lighting styles, in plain English.

Every name is really three decisions.

The vocabulary sounds like a hundred separate techniques. It is closer to three dials, and reading those three is enough to name what is happening in any portrait put in front of you.

• Direction: where the main light sits, how far around to one side of the lens and how far above your eyes. This decides which side of your face is lit and where the shadow lands.
• Quality: how large that source is as your face sees it. Large and close gives a soft, gradual shadow edge. Small or far away gives a hard, sharply drawn one.
• Ratio: how much light gets back into the shadow side. Lift it and the picture reads open and light. Let it fall away and the picture reads weighted and serious.

Every named style below is a position on those three dials. A photographer changing the look of a portrait is usually moving a stand a foot to the left, not reaching for a different discipline.

All of this assumes light you get to place, which is the argument behind the studio versus outside comparison. Borrowed light hands you direction and quality as they happen to be. Built light gives you all three dials.

Broad light and short light.

Turn your face slightly away from the lens and you now have two different cheeks in the picture. The near one is closer to the camera and takes up more of the frame. The far one reads narrower. Which of those two the main light lands on has a name.

Broad light puts the key on the near, larger side, so the wider part of the face is the bright part and the shadow falls away out of view. The face reads open, even and light, and a narrow face gains presence.

Short light does the opposite. The key lands on the far side, the near cheek falls into shadow, and the lit part of the face is the smaller part. This is the more sculpted of the two: it adds depth, it draws a clear edge along the jaw, and it renders a fuller face with more shape. A great deal of business portraiture is short light, softened.

Neither is a rule. Which way you turn, how far, and which side the light is on get decided together with the distance the camera sits at, because all three change what the frame does with your features.

Split, Rembrandt, loop and butterfly.

These four are the classic patterns, and every one is named for what the shadow beside your nose is doing. Watch that shadow in any portrait and you can name the light.

• Split: the key is out at the side, level with your face, so half the face is lit and half falls into shadow, divided down the middle. Dramatic, rare in business work, and unforgiving of a face that is not symmetrical, which is every face.
• Rembrandt: the light moves round toward the camera and up. The shadow from the nose runs down and joins the shadow coming off the cheek, leaving one small lit triangle on the shadow-side cheek. It sculpts firmly and reads as classic and serious.
• Loop: bring that same light a little further toward the lens and the nose shadow detaches, hanging as a small loop pointing down toward the corner of the mouth without touching the cheek shadow. Dimensional but approachable, which is why it turns up in more portrait work than any of the others.
• Butterfly: swing the light all the way round to directly in front of the face and raise it, and the nose casts a small symmetrical shadow straight down onto the lip. Even, kind to cheekbones, and it hollows the eyes if it goes too high.

The important part is that they are not four techniques. They are one continuous walk. Start with the light in front of your face and carry it around toward the side, and the pattern goes butterfly, loop, Rembrandt, split, in that order, every time. Raise it and the shadows lengthen downward. Lower it and they climb.

Clamshell, and why it looks so even.

Clamshell is butterfly with a second source added below the face, aimed up, either another light or a reflector catching spill from the first. The two sandwich the face between them, which is where the name comes from.

What it does is fill. The shadow under the brow, the one under the nose and the one under the jaw all get light thrown back into them, so the ratio flattens right out. Skin renders smooth because there is very little shadow left to describe texture, and the eyes pick up two catchlights stacked one above the other, which is the giveaway.

It suits beauty-leaning portraits and a certain kind of bright, polished brand image. It is the wrong tool when a face wants structure, because the same fill that softens texture also removes the shadow that was drawing your cheekbone and your jaw. Over-filled light is the most common reason a technically clean portrait still looks like nothing much is happening, and the fix is almost never a new setup. It is turning the fill down until shape comes back.

Hard light and soft light.

Soft and hard have nothing to do with brightness. They are decided by one thing: how large the source is from where your face is standing. A large source close to you wraps around the curve of your cheek, so the shadow edge is a slow gradient. A small source, or a large one moved far away, cannot wrap, so the shadow edge is a hard line.

This is why the sun is a hard source on a clear day. It is enormous and also so distant that it reads as a tiny bright point, and it draws shadows with a razor. Put cloud in front of it and the whole sky becomes the source, which is about as large and as close as light gets.

What each does to a face is straightforward. Soft light renders skin texture with less emphasis and is easy to sit under. Hard light describes texture, edges and bone, and it reads as deliberate when it is controlled and as harsh when it is not. Neither one is the professional choice. Half of what makes a photo look expensive is simply that whichever was used was chosen on purpose.

Distance is the control most people forget. Move the same source twice as far away and it gets harder, and it also falls off less across your face, so the far side of your head stops going dim.

High key and low key.

These two describe the finished frame, not the lighting position. High key means the picture lives in the light end of the scale: a bright background, shadows lifted almost to nothing, very little true black anywhere. Low key means the opposite, a frame that sits mostly in the dark end, the background falling away to near black, one clear source doing the shaping.

Both get confused with exposure, which is the one thing they are not. A high key portrait is not an overexposed one, and your face is rendered normally in it. A low key portrait is not an underexposed one, and your eyes stay perfectly readable. What changed is everything around your face.

Use follows from that. High key sits well in a directory row where every surrounding element is white, and it reads open and current. Low key carries weight, which is why it turns up on leadership pages, press pages and portraits meant to be printed large. Which one you get is bound up with the white, gray or black backdrop behind you, because background tone is doing half the job.

How to ask for what you want.

You do not need any of this to get the picture you are after. The most useful thing you can do is bring two or three portraits whose light you like and one you do not, and say what you notice about them. Ordinary words work perfectly well, because they translate cleanly.

• Bright and open, nothing heavy: a soft key closer to the lens, shadows lifted, a lighter background.
• More serious, more weight: shorter light, a deeper ratio, a background allowed to go dark.
• Smooth and polished: fill brought up under the face, softer key, less texture described.
• Sharper, more editorial: a harder key with a defined shadow edge and a clean edge along the jaw.
• It has to sit beside my colleagues: match direction and background tone first, everything else second.

Where the picture is going matters as much as the adjective. A portrait shrunk into a small circle needs contrast that survives at that size. A portrait heading for print needs shadow detail that will not block up on paper. Naming the destination is how the light gets chosen, and how the digital files come out sized for the job.

That conversation is the wardrobe consultation, and it happens before you arrive. Plan it around all the places you will use your headshots everywhere this coming year, not just the one profile you are fixing this week. That is the reasoning behind the whole guide to professional headshots, and why the range across my headshots is not one look repeated.