The Fixtures, Meters and Methods Behind Our Lighting Plots

Starting with a tape measure and a notebook

Every lighting plot we draw begins in the room itself, not on a screen. Before choosing a single fixture we walk the studio with a tape measure, a notebook and a camera, noting ceiling height, rigging points, wall colours, window positions and where the cables can realistically run. A plot that looks neat on paper but ignores a low beam or a pillar will cost the crew an afternoon on the day of installation.

We also ask who will sit where. A presenter at a news desk, two guests in armchairs and a standing reporter all need different treatment, and so does a set with a glossy table or a pale backdrop. The notes we take in those first hours decide how many fixtures we specify and how much flexibility the crew will have later.

From the survey we produce a simple plan view and a side elevation, marked with fixture positions, heights and cable routes. Crews tell us they rarely read anything longer than that, so we keep it to those drawings and a short fixture list.

• Ceiling height and rigging points
• Wall, floor and set surface colours
• Window and daylight exposure
• Cable routes and power availability

Choosing fixtures: LED panels, soft sources and why

For most news and interview sets we now rely on LED fixtures, mainly because they stay cool, draw modest power and hold a steady colour temperature through a long programme. Large soft panels serve as key and fill light, while smaller focusable units handle backlight and set dressing. We favour fixtures with adjustable colour temperature so that a studio can match daylight from a window or warm things up for an evening show.

We are cautious about stacking cheap panels with mixed colour rendering. Two fixtures that read identically to the eye can look noticeably different on camera, giving one guest a green cast and another a pink one. Where the budget allows, we specify units from a single family and keep spares of the same type.

Diffusion is part of the toolkit too. Frames of silk, dimmable controls and simple flags let a crew shape the light without buying more equipment, and they are easy to adjust while the programme is being rehearsed.

Metering and checking what the camera actually sees

Our eyes forgive a great deal that a camera does not, so we measure instead of guessing. A light meter gives us a consistent exposure level across the presenter positions, and a colour meter confirms that fixtures match one another. We aim for faces to sit at the same level whichever chair is used, so that cutting between cameras does not make anyone appear to brighten or fade.

We also look at the picture through the studio's own monitoring. A waveform and a calibrated monitor show clipping on a white shirt or crushed shadow on a dark suit far sooner than a glance at the set would. Priya, who leads our lighting and camera work, usually adjusts with a stand-in seated in each position.

Readings are written down and kept with the plot. When a fixture is replaced months later, the crew can restore the original levels instead of starting from memory.

• Exposure level at each presenter position
• Colour temperature match between fixtures
• Waveform check for clipping and crushed shadow

Skin tones, backgrounds and keeping faces consistent

Presenters and guests vary widely in skin tone, and a plot has to work for all of them without constant re-lighting. We set the key light at a level that holds detail on darker skin without burning out paler faces, then use fill and backlight to separate people from the set. A modest ratio between key and fill gives a natural look and avoids the flat, over-lit appearance common in poorly designed studios.

Backgrounds need their own thought. A bright screen directly behind a guest will pull the camera's exposure down and turn the face dull, so we light the set at a lower level than the talent and keep it free of hot spots. Reflective surfaces such as glass tables are angled or dulled so they do not throw a fixture straight back into the lens.

These choices are small individually, but together they are what makes a programme look like the same programme from one week to the next.

Documenting the plot so any crew can run it

A lighting plot is only useful if the next person can read it. We deliver a labelled plan, a fixture schedule with positions and settings, and a short sheet of presets for common scenes such as a single presenter, a two-way interview and a wide opening shot. Each fixture is numbered on the rig itself with a tape label that matches the drawing.

This follows the preference James and the rest of the team share for simple, well-labelled setups that crews can fix at speed. When a lamp fails ten minutes before transmission, nobody should need to search for the right drawing or guess which unit is which.

We also leave guidance on routine care: cleaning diffusion, checking clamps and safety bonds, and noting any fixture that has drifted in colour. None of it is complicated, and it keeps the studio looking the way it did when we handed it over.

• Labelled plan and elevation drawings
• Fixture schedule with positions and settings
• Preset sheet for common scenes
• Matching tape labels on the rig

Testing under rehearsal conditions before going live

The last stage of any lighting job is a rehearsal under real conditions. We run the studio with the actual presenters, the actual set and the cameras working to the programme's usual shot list, then adjust whatever the run-through reveals. Problems that never show in an empty room appear quickly once people move, gesture and lean forward.

In these shorter autumn days the point matters more: studios with windows or glazed roofs change character through the afternoon, and a plot balanced at midday may need correcting for a late bulletin. We check the lighting at the times the programmes actually air.

Only when the picture holds across the full rehearsal do we consider the plot finished, and we write up any final changes into the documentation straight away.