How a lighting plot goes from a bare grid to a finished set

Starting with a walk around the empty floor

Every plot we draw begins on the studio floor with the lights off. I stand where the presenter will sit and look up at the grid, the ceiling height, the power available and the walls that will bounce light back. Before any fixture is chosen, I want to know where the cameras will sit, how far the desk is from the backdrop and whether anyone walks through the shot during a bulletin.

James Whitfield, who designs our lighting, usually joins this walk with a notebook and a tape measure. He asks the producer what the programme looks like on a good day and on a bad one: a single presenter at a desk, or two guests and a standing segment by the weather wall. The answers decide how many positions need light and how much movement the rig must forgive.

We also note the practical limits early. A grid that cannot take extra weight, a room with no blackout or a power supply shared with the gallery will all shape the plot more than any preference for a particular fixture.

• Ceiling and grid height, and what the grid can carry
• Camera positions and lens choices already fixed
• Power available and what else shares it
• Daylight or reflective surfaces that will change the picture

Drawing the plot before touching a lamp

Once the walk is done, James draws the plot on paper first. It shows each fixture, its position on the grid, its purpose and the beam it should throw. Key, fill and backlight for each presenter position are marked separately, so anyone reading the drawing can see why a light is there and what removing it would change.

We keep the plot readable on purpose. A crew member who arrives for an early bulletin with no briefing should be able to look at the drawing and find the light that needs attention. Notes are short: which dimmer channel, which colour temperature, which presenter position it serves.

The drawing also lists spares and swaps. If a particular fixture fails, the plot says which neighbouring light can cover until it is replaced. That small piece of planning has saved more live shows than any clever effect, because the crew is never improvising under pressure.

Balancing key, fill and backlight on real faces

The key light shapes the face, the fill softens the shadows it creates, and the backlight separates the presenter from the set. On paper the balance looks simple. In the studio it depends on the people in the chair, so we test with the actual presenters wherever we can, not with a stand-in or a grey card alone.

Skin tones vary a great deal, and one setting rarely suits everyone. We work out a middle position that holds for the regular team and note small adjustments for guests with very pale or very deep complexions. The aim is that nobody looks flat, shiny or sunken, and that the picture stays steady when a presenter leans forward or turns to a colleague.

I watch these sessions from the gallery, because that is where the picture is judged. The camera operators give their view too, since a light that looks fine to the eye can cause a glare on a monitor or a reflection on a desk surface.

• Key set first, then fill brought up until shadows are gentle
• Backlight checked from each camera angle
• Desk surface tested for reflections on screen

The focus session with the crew

Rigging and focusing are done with the people who will run the studio afterwards. We do not hand over a finished rig and leave. The crew climb the access, adjust the shutters and set the beam edges alongside James, so they learn why each light sits where it does.

This takes a few hours and it is rarely glamorous. Fixtures are nudged, barn doors trimmed to keep light off the backdrop seams, and the dimmer levels recorded against numbered presets. When the session ends, the crew can recall a bulletin look, a two-guest look and a standing-segment look from the desk without guessing.

Handing over this knowledge is the part that lasts. Lamps fail and bulbs age, but a crew who understand the plot can rebuild a look from a drawing and a few notes, which is exactly what a busy news operation needs.

Checks that keep the look steady week to week

A good plot drifts if nobody watches it. Lamps lose output, a fixture gets knocked during a set change and a new camera lens alters how the light reads. We leave the crew a short routine: a quick picture check at the start of each shift, a note of any lamp that looks dim and a monthly look at the focus on the main positions.

Colour temperature gets particular attention. Mixing old and new fixtures, or letting daylight leak in from a corridor door, shifts skin tones faster than most people expect. A simple rule of replacing lamps in matched sets keeps the picture consistent over many weeks.

These checks take minutes, not hours. The point is to catch small changes before the presenter or director notices them on air, and to give the crew a clear sense of when something needs a proper call to us.

• Picture check at the start of every shift
• Matched lamp replacement, not one at a time
• Monthly review of focus on main positions

What we leave behind after a lighting job

When a project closes, the studio keeps the plot drawing, the dimmer preset list and a short note on each lighting position. These are plain documents, written for a crew member who was not in the room when the rig was built, and they sit near the desk rather than in a folder nobody opens.

In these darker autumn weeks, studios often notice their lighting more, because early and late bulletins lose the help of daylight from nearby windows. It is a good moment to walk the floor again, compare the picture to the plot and see whether anything has shifted since the summer.

If a studio wants a second pair of eyes, James and I are glad to look over the rig with the crew. Most of the time the answer is a small refocus and a lamp swap, not a rebuild.