Lighting Mistakes in Live Studios and How to Avoid Them

The most frequent fault I see in studios we are asked to look at is a set lit by fixtures that do not agree with each other. A desk is lit with LED panels at one colour temperature, a backdrop wash comes from older units at another, and a window or practical lamp adds a third. Each looks acceptable to the eye, because the eye adapts, but the camera does not adapt in the same way. Skin tones drift between shots, and the vision mixer ends up compensating in the gallery.

The fix starts on paper. Before any fixture is bought, the lighting plot should state one working colour temperature for the studio and list every source against it. Where daylight cannot be blocked, it is better to flag it as a known problem and plan for it than to hope the camera balance will cope. Consistency across the whole rig matters more than chasing the highest specification on a single lamp.

We also ask crews to check colour rendering, not only temperature. Two panels can both read as the same temperature and still render a red jacket differently.

• Set one target colour temperature for the whole studio
• List every source, including practicals and windows
• Check colour rendering as well as temperature

A second common error is treating the presenter as just another object to illuminate. A single large source placed close to the camera lights the face evenly but removes all shape, and the picture looks like a notice board. At the other extreme, a strong key light from too high an angle drops dark shadows into the eye sockets, which is unkind to almost everyone and especially under a long programme.

A workable approach for a news desk is a key light slightly off the camera axis, a softer fill on the opposite side, and a back light that separates the shoulders from the set. The exact angles depend on the desk, the presenter's height and the lens in use, so they are worth testing with a real person sitting in the real position rather than a stand-in stool.

It is also worth remembering that presenters move. A fixed mark on the floor, agreed with the presenter, keeps the face inside the area you have lit.

Walk the lit area with a monitor in hand before rehearsal, and note where the picture falls apart.

• Place the key slightly off the camera axis
• Use a softer fill on the opposite side
• Add a back light to separate the presenter from the set

Rigging errors are less visible than colour problems, but they carry more risk. Fixtures are added over the years until a grid bar carries more than anyone has calculated. Cables are looped over the structure for convenience, safety bonds are left off, and nobody records which luminaire hangs where. The studio still works, so the problem goes unnoticed until a lamp has to be changed in a hurry.

Every grid and bar has a rated load, and that figure should be written down, with the weight of each fixture, clamp and cable run counted against it. Safety bonds belong on every hanging unit. A simple rigging register, kept beside the plot, lets a new engineer see at a glance what is up, what it weighs and when it was last inspected.

Work at height should always follow your own site rules and be done by people trained for it. We plan the rig so that the commonly adjusted fixtures can be reached safely.

• Record the rated load of each bar and grid section
• Fit safety bonds to every hanging fixture
• Keep a register of what hangs where and when it was checked

It is tempting to pick fixtures from brightness figures and price. In practice, the details that cause on-air trouble are elsewhere: visible flicker when the shutter speed changes, fan noise that reaches the microphones, dimming that shifts colour as the level drops, and control protocols that do not match the desk. None of these show up clearly on a data sheet.

Whenever possible, test a fixture in the studio itself, on camera, at the levels you will actually run. Dim it slowly and watch the colour on a monitor. Listen for fan noise with the microphones live. Confirm that the control connection works with your existing desk before an order is placed.

This is also where lighting and acoustics meet, since a noisy fan undoes careful room treatment. If a quiet fixture costs a little more, that is usually money well spent on a news set.

• Test flicker at the camera shutter settings you use
• Dim slowly and watch for colour shift
• Listen for fan noise with microphones open

The last mistake is organisational. A rig is designed, installed and tuned by one person, who then moves on, and the knowledge goes with them. Weeks later a different operator moves a fixture to suit a guest, and no one can say how to return the set to its original look. Presets on the lighting desk are overwritten, and the next programme begins with an argument.

A written plot, with fixture positions, channel numbers, intensities and the purpose of each light, is the cheapest insurance a studio can have. Pair it with saved desk scenes for each format, named plainly, and photographs of the finished set from the main camera positions.

When we hand over a rig, we walk the crew through the plot on the floor and have them rebuild one scene themselves. If they can do that, the system is theirs.

• Keep a written plot with channels and intensities
• Name saved desk scenes by programme format
• Have the crew rebuild one scene before handover