Lighting Design Mistakes We See Most Often, and How to Avoid Them

The most frequent fault I meet is a lighting grid drawn before anyone has agreed where the set, the presenter positions and the cameras will stand. Hanging positions then follow the architecture of the ceiling rather than the needs of the picture. A fixture ends up too steep over a desk, or a key light is blocked by a camera crane that nobody had placed on the plan.

The remedy is dull but reliable: wait for a stable floor plan, even a provisional one, and draw sightlines from each camera before choosing a single hanging position. Mark where talent will stand and where they might move. If the set is still changing, leave bars in reserve rather than filling every metre of grid, because a rig packed too early is expensive to undo.

• Confirm camera positions before fixing hanging points
• Mark talent positions and likely movement on the plan
• Keep some grid bars free while the set can still change

Fixture selection goes wrong when it is driven by a data sheet instead of the room. A unit that looks generous on paper may be too bright for a low ceiling, or have a beam that is too narrow to cover a wide desk without hot spots. Colour quality is another trap: two fixtures from different families can both claim a similar output yet render skin tones quite differently on camera.

Work from the distance between fixture and subject, the beam angle you actually need and the height of the grid. Where possible, view the shortlisted fixtures together on a test day, on camera, with the colours and fabrics the set will use. Mixing too many fixture types makes matching harder, so keep the list short and deliberate.

• Calculate throw distance from the real grid height
• Compare fixtures side by side on camera before buying
• Limit the number of fixture families in one rig

Power distribution is often left until the fixture list is final, and by then it is awkward. Circuits are overloaded, dimmer racks are in the wrong place and cable runs cross walkways. Heat is the quieter problem: a studio that is comfortable during a rehearsal can become uncomfortable under a full rig after an hour, and air handling that was sized for a lighter load struggles.

Add up the real load early, including the fixtures you intend to add later, and agree a sensible margin with whoever looks after the building supply. Talk to the facilities team about cooling at the same time. A short conversation at planning stage saves a difficult one on the first long recording day.

• Total the connected load with room for later additions
• Place distribution close to the grid to shorten cable runs
• Raise heat and ventilation with facilities during planning

A well hung rig can still look poor if the control programming is squeezed into the final hours. Cues are written in a hurry, naming is inconsistent and nobody can tell afterwards which preset belongs to which segment. When a different operator takes over the next week, they spend the first hour working out what the previous person meant.

Set aside real programming time, separate from the rigging, and agree a naming scheme before you begin. Build a small number of reliable looks first, then refine them. Save a clean copy of the show file once the programme is settled, and keep a short written note beside it describing each look and when it is used.

• Book programming time apart from rigging time
• Agree cue and preset names before writing anything
• Keep a backed-up clean copy of the show file

Lighting is judged on screen, yet the lighting designer and the camera crew sometimes never speak until the first rehearsal. Exposure levels, colour temperature and contrast then get argued over while the schedule runs down. A look that pleased everyone in the room may be hard for the cameras to hold across a long scene.

Arrange a joint session early, with the camera systems engineer and whoever will shade, and agree target levels together. Decide what the shading operator can adjust and what stays fixed at the lighting desk. A single shared reference frame, saved from that session, gives everyone something concrete to return to when the picture drifts during a long day.

• Hold a joint check with the camera and shading crew
• Agree target exposure and colour temperature in writing
• Save a reference frame to return to during the show

The last mistake is treating the job as finished when the lights come on. Without a handover, the people who run the studio week to week inherit a rig they do not fully understand. Fixtures get moved, focus is lost, and the original intent drifts away within a few productions.

Finish with a plan that matches what was actually built, a fixture schedule with positions and circuits, and a short session with the operators who will use the rig. Note how to reset the studio to its standard looks and who to ask when something behaves oddly. It is a small amount of paperwork that keeps the lighting dependable long after the first show.

• Update the plan to match the rig as built
• Provide a fixture schedule with positions and circuits
• Run a short handover with the regular operators