How a lighting plot goes from empty grid to camera-ready studio

Starting with the room, not the fixtures

Every plot I draw begins with a visit, or failing that a set of honest measurements. I want the ceiling height, the grid or bar positions, the available power on each circuit, and the colour and finish of the walls and floor. A pale floor bounces light back up under the chin; a dark cyclorama swallows it. None of that appears in a fixture catalogue, yet it decides half of the result.

I also ask what the room is used for across a normal week. A studio that records a morning discussion programme on Monday and a cookery format on Wednesday needs a rig that adapts without a full re-rig. That conversation shapes how many positions we fix permanently and how many we leave flexible.

Only after that do I open a blank plan and think about instruments.

• Ceiling height and grid layout
• Circuit capacity and dimmer or DMX paths
• Surface colours and reflectivity
• Weekly programme types using the space

The first sketch and the presenter question

My first drawing is rough, usually in pencil over a scaled floor plan. I mark where the presenters sit or stand, where the cameras will travel, and the sight lines between them. Lighting that looks lovely from the floor can throw a harsh shadow across a lens, so camera positions come before any lamp is placed.

Then comes the person. A presenter who walks the set needs even coverage across a path, while a seated panel can take a more sculpted look. I ask the producer how much movement to expect and whether guests will vary in height, skin tone and clothing, because a single fixed key angle rarely suits everyone.

From there I place key, fill and back light for each main position and check angles against the grid.

Choosing fixtures and keeping colour honest

Fixture choice is where practical limits show. I weigh output, beam control, noise from fans, heat in a small room and how the colour rendering holds up on camera rather than to the eye. Two fixtures that look matched in the studio can drift apart on a sensor, particularly when dimmed, so I prefer a small number of well-understood types over a large mixed collection.

I note colour temperature for each position and stick to it unless the set design has a reason to break it. Mixing warm practical lamps in shot with cooler key light is fine, but it should be a decision, written down, not an accident discovered during rehearsal.

The result of this stage is the fixture schedule, which lists type, position, circuit, colour and purpose for every lamp.

• Output and beam control for the throw distance
• Fan noise and heat in smaller studios
• Consistent colour temperature across positions
• Dimming behaviour on camera

Testing on camera before anything is fixed

Paper plots are only a hypothesis. When the rig goes up, I work with the camera operator or vision engineer and judge the picture on a calibrated monitor rather than by eye. We bring in stand-ins who match the real presenters as closely as we can, and we check faces, set pieces and backgrounds together.

Typical adjustments are small: a key moved ten degrees to lose a shine on a forehead, a back light flagged to stop it flaring into a lens, a fill brought down so the picture keeps some shape. I would rather make these changes slowly and record each one than rush to a result nobody can repeat.

Exposure and white balance settings from this session go into the notes so the camera team can return to them.

What the crew receives at handover

A plot is only useful if the people running the studio can read it six months later. I hand over a marked plan, the fixture schedule, a patch list showing which lamp sits on which channel, and a short written note of the looks we built, with levels for each. Nothing in it assumes the reader was in the room.

Where a team will run several programme looks, I record each as a named state with its intensities, so a duty operator can recall it without guessing. I also note which lamps are most likely to need attention first, such as those on the busiest positions.

If the crew is new to the rig, I stay for a rehearsal so questions are answered while the equipment is in front of them.

• Marked plan and fixture schedule
• Patch list with channel numbers
• Recorded looks with levels
• Notes on maintenance priorities

Autumn changes the job more than people expect

At this time of year, studios with windows or glazed roofs lose daylight early, and a rig that behaved in October afternoons may need revisiting once the evenings darken. I often get calls in these weeks from teams whose recorded shows now run into dusk and show a colour shift they never noticed in summer.

It is also a sensible moment to check lamp hours, clean lenses and diffusers, and test dimmer channels before the busier winter schedule begins. None of this is dramatic work, but small drift in output accumulates, and a short audit now is cheaper than correcting colour in every edit later.