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There's a myth in UK commercial production that pre-light days are a luxury. Something the big American productions do, something agencies in London occasionally splash on for a Burberry shoot, and something the rest of us mortals should be able to skip if we're any good.

I've come to the opposite view. On about a third of the shoots I take on, a pre-light pays for itself before lunch on day one. On another third, it's a waste. The question is whether you can tell the two apart before you've already spent the day.

Let me take you through what I've learnt.

What a pre-light day actually is

A pre-light — sometimes called a pre-rig day or tech scout — is a studio day, usually the day before the main shoot, where you rig the lights, test the camera, confirm the set is ready, and nothing else happens. No talent. No client. Sometimes the DP and gaffer only. Sometimes the whole crew minus MUA and wardrobe.

Cost varies wildly. A minimal pre-light with gaffer, spark, and a 1st AC runs £1,400 to £2,200 in London for the day. Full crew including DP, 2nd AC, data, grip and wardrobe prep can push £4,500+. Studio hire doubles if you need the space both days. That's a real number, not a rounding error.

So when does it make back the money?

Case one: complex set builds

If your shoot involves a set build that needs to be rigged before lighting — scenic flats up, prop dressing complete, practicals wired — you need a pre-light. End of debate.

The maths is simple. If you try to build and light on the same day, you have a set crew and a lighting crew tripping over each other for the first four hours, and then a lighting crew staring at the ceiling while the set dressers finish. Six people on standby at £65–£120/hour is burning £400–£700 an hour. Do that for three hours and you've already justified the pre-light.

Rule of thumb I use: if your set-build bill is more than about 20% of total production cost, pre-light is almost certainly cheaper than combined.

Case two: complicated lighting that's new to the crew

Second case. You're doing something the crew hasn't done before, or hasn't done recently.

Example from last autumn. I was lighting a rain sequence — proper rain bar over a talent who needed to read as hero but wet. That meant a backlight punching through the rain, a key that didn't bounce off the wet floor into the lens, and a fill that didn't flatten the whole thing. Four hours of testing in the morning of the pre-light saved us at least six on the day. Because on the day, the talent was on the clock at £480/hour and the agency producer was standing there looking anxious.

Things that reliably benefit from pre-lighting:

Any water effects — rain, submerged, dripping, spray.
Coloured lighting schemes where you're mixing HMI, tungsten and LED with specific colour temps.
High-speed work with continuous lights at 1000fps+ — you'll need to test flicker, frequency and the exact frame rate multiplier.
Anything with Arri SkyPanel colour mixing where you need to land a specific LEE gel equivalent rather than guess.
Car interiors or vehicle lighting where the rigging itself takes three hours.
Tabletop food shoots where the fake-steam setup, the glycerine-water mix and the gel temp need to be landed before the first dish is cooked.

If your shoot is on that list, pre-light. Pay for it. You'll make the money back in reduced day-of stress alone, ignoring the actual time saved.

Case three: talent availability is tight

Here's the one producers undersell. If your talent has a 6-hour window because they're also on another job, or because they're a kid and child-licensing regs limit you to a specific number of hours on set — every minute of that window is gold. You cannot afford the first forty minutes being "hang on, can we try this with a deeper fill, actually hold that, let me bring the fresnel in three feet."

Pre-lighting means the first shot is framed, lit and ready before talent walks in. Camera rolling thirty minutes after arrival, not three hours after. The maths there works out in almost all cases where talent is charging more than £250/hour.

When it's a waste

Now the cases where producers should push back on a pre-light request.

Simple setups on familiar kit. If your shoot is a 1-day lifestyle editorial, flat white seamless, key and fill, no practicals, no set build, with a DP you've worked with six times before — don't pre-light. You'll set up in forty minutes on the day and be shooting by 10am. A pre-light adds £2k and three hours of faff for no measurable benefit.

Tabletop product on a looping set. If you're shooting 80 skus of lip balm with the same light rig for the whole day and the rig is simple — one softbox, one fill card, one graduated background — there's nothing to pre-light. The first set-up is the test.

When the studio is an absolute stock space. If you know the cyc, the power, the sockets and the stand inventory inside out because you've shot there sixteen times — some of the value of a pre-light evaporates. You're not discovering anything.

Tight budget with creative client. If the budget is sub-£15k all-in and the client is trusting but cost-conscious, a pre-light might be the thing you sacrifice so they can afford a decent stylist. Nothing wrong with that call.

Half-day pre-lights — the underrated middle option

Most pre-light conversations go full day / no day. Worth mentioning: a half-day pre-light — four hours, usually in the afternoon — is perfectly possible and often a better spend.

You can rig, block, and test key setups in four hours. You skip the faff of a full 10-hour day. Studios will often let you roll the half-day into the next day's booking at a discount — I've had places in Hackney Wick and Park Royal do 4 hours prior + full day after at roughly 1.3x the single-day rate.

If I'm on a borderline shoot where I'm not sure whether a full pre-light pays, I push for a half. Nine times out of ten it's enough.

The things to actually do on a pre-light

Too many pre-lights turn into three hours of setting lights and six hours of sitting around. If you're paying for one, run it properly.

Sensible order:

Confirm power — plug in every light you're running, run them for twenty minutes, make sure nothing trips. Map the ring circuits so you know where each head's actually drawing from.
Rig the key lighting scheme for shot one. Stand-in meter readings. Note every setting.
Shoot tests on the actual camera with the actual codec. Not "we'll grade it tomorrow" — grade a tiny proxy now, check skin tones, catch the issues.
Mark the floor. Gaff tape where stands sit, where talent walks, where camera rolls to.
Rig shot two. Stand-in again. Note the transition — how long it actually takes to move from one to the other.
Do a walkthrough of the day's schedule with the gaffer and 1st AC so everyone knows the order.

If your pre-light doesn't touch camera, you've half-done it. Rigging without shooting leaves the biggest unknowns — codec behaviour, real exposure latitude, skin tones — untested until you have talent in front of the lens.

How to sell it to the client

The actual pitch matters. "We need a pre-light day" lands as "extra cost." "We're reducing on-day risk by pre-testing the lighting rig the afternoon before — it'll save about 90 minutes of setup on the day and means we can spend that time on performance not tech" lands as "good production thinking."

Same day. Same money. Different frame.

I've started pitching half-day pre-lights as "tech prep afternoon" on the schedule, quoted into the total as a line item, not a separate day. Clients don't flinch. They flinch when they see "Day 0 — pre-light" as a surprise line on the budget.

The crew question

Crew on pre-lights. Don't skimp. The temptation is to save money by only bringing the gaffer and a spark. Sometimes that's right. But on anything camera-specific, your DP and 1st AC should be there — the DP is the one approving the light, and the 1st AC is mapping focus and lens-specific issues.

What you can almost always skip: MUA, stylist, wardrobe, runners (except one), and the agency side. Invite the producer if you want eyes; don't invite the creative director unless you want opinions at 4pm about the key ratio that need a two-hour discussion.

The bottom line

Pre-lights pay off when:

Set build or rig is more than 20% of production cost.
Lighting is unfamiliar or technically tricky.
Talent cost-per-hour is high or windows are short.
The client cares about polish and will notice the difference.

They don't pay off when the shoot is simple, the crew knows the setup, and budget pressure means something else has to go.

When in doubt, push for a half-day. You'll rarely regret it. The one shoot you'll regret is the one where you didn't pre-light the rain rig and spent the first two hours of day one watching water pool in the wrong place while talent's agent phoned the producer every twenty minutes.

If you're putting together a shoot that needs proper pre-light capacity — big studios, drive-in access, power for the full rig running flat — have a look at creativestudiohire.com. Filter for pre-light-friendly bookings and studios that offer combined rates. The numbers usually work out.

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