Lighting design checklist: what to settle before you commit to a plot

Start with the picture you need on screen

Before anyone draws a rig, write down what the camera must see. A single-presenter news desk, a three-camera discussion set and a conference stage with a speaker walking across it all ask different things of the lighting. Decide the shot sizes you will use, how many camera positions look at the set, and whether any move. Those answers fix how many angles each person must be lit from and how much of the set stays in frame.

I ask producers to bring stills or sketches of the shots they expect, even rough ones. A clear picture of the widest shot matters most, because that is where unwanted fixtures, stands and cables show up. If the widest shot is not yet agreed, the plot will have to cover everything and will cost more to build and to run.

Also note the tone. A warm, soft look and a crisp, high-contrast look use different fixtures and different levels, and changing your mind after the rig is hung is slow work.

• Shot sizes and number of camera positions
• Whether cameras move or stay fixed
• The widest shot, and what must stay out of it
• The look you want: soft and warm, or crisp

Measure the room before you trust the drawing

A plot drawn on a floor plan can look sound and still fail in the room. Check the ceiling height from floor to the underside of any grid or truss, because that height limits how steep your key light angle can be and how far fixtures sit from the talent. Low ceilings push light flatter and closer, and they trap heat.

Find out what the ceiling can actually carry. A suspended grid, a lighting bar or a stage truss each has a stated load limit, and the total of fixtures, cables and any drapes counts against it. If you cannot get the load rating in writing, treat that as an open item and settle it before ordering anything.

Look at windows and doors too. Daylight that drifts through a shift changes colour balance on camera, and a studio with open glazing needs either blackout or a plan that tolerates the change.

• Floor to grid or truss height
• Written load rating for each hanging point
• Windows, doors and any daylight leakage

Count the power and the cooling honestly

Lighting is the largest electrical load in most studios and the one most often underestimated. Add up the wattage of everything that might be on at once, then check it against the supply and the circuits available, not against what the building as a whole receives. Dimmer racks, if used, need their own feed and space to breathe.

Heat follows power. A rig that suits a winter afternoon in a cool room can make a small studio uncomfortable by the second hour of a long recording. Ask who looks after ventilation and whether the air handling can cope with the full rig running, with people and equipment in the room as well.

Modern LED fixtures draw far less than older tungsten units, but they bring their own questions about colour consistency on camera and about control. Weigh them against your cameras rather than assuming they are simply better.

• Total load against available circuits
• Dimmer or power distribution location
• Ventilation under a full rig and a full crew

Decide how the lights will be controlled and by whom

A good plot can be undone by a control scheme nobody on the crew understands. Decide early whether lighting will be run from a desk, from presets recalled by the gallery, or set once and left alone. A daily news set may need only a few saved states, while an event stage might need cues built for each speaker.

Think about who is in the building. If the same people light, operate cameras and mix sound, a simple, forgiving setup serves them better than a clever one. If a dedicated operator is available, the plot can ask more of them.

Agree on labelling and documentation as well. Every fixture should have a number that matches the plot, so that a person arriving cold can find and fix a problem without a phone call to whoever drew it.

• Desk, presets or fixed setting
• Who operates it on a normal day
• A numbered plot that matches the rig

Plan for access, safety and the day it goes wrong

Ask how fixtures will be reached once hung. A rig that needs a tall access tower and two people for every lamp change will be neglected, and neglected rigs drift out of focus and out of colour. Fixed grids with walkways, or bars that lower to the floor, make routine care realistic.

Check the safety basics: secondary safety bonds on every hung fixture, cable routes that keep mains separate from signal, and clear floor space where people will walk. These are small items on a plan and expensive to put right afterwards.

Finally, keep a spare. A few spare lamps or a spare fixture of the most used type costs little compared with a delayed recording. Note where spares live and who knows the location.

• Safe access for lamp changes and refocusing
• Safety bonds and cable separation
• Spares and where they are kept

Set the budget around choices, not catalogue totals

When a lighting budget is built from a list of fixtures alone, it leaves out rigging, cabling, control, installation and the time to focus and commission. Ask for the whole cost of the working rig, and ask which items would change if the set, the room or the camera choice changed.

It helps to separate what must be right on day one from what can be added later. Key and fill positions for your main set are usually the first call. Effects, backlight colour and a second set can follow once the first is proving itself.

If you are comparing proposals, compare them on the same footing: same fixtures per position, same control, same installation scope. A lower number often reflects a smaller scope rather than a better price.

• Rigging, cabling, control and commissioning included
• What is needed at the start and what can follow
• Proposals compared on the same scope

A lighting plot is easier to approve when the questions are answered in order: the picture you need, the room that holds it, the power and cooling behind it, the people who will run it, and the budget that covers all of it. If several of these remain open, hold the decision a little longer. A short conversation about the set and the ceiling now is far cheaper than moving a rig later.