Start with what can still change
The ceiling is going in next week and somebody has finally asked what the lights should do. It is an uncomfortable moment, but it does not automatically mean starting again. The first job is to separate fixed decisions from choices that are still open.
Mark three things on the current plan: installed work, ordered equipment and undecided items. Add the date each decision becomes difficult to change. A cable position that needs attention tomorrow is more urgent than choosing a decorative shade next month.
Then name the actual problem. “The kitchen is wrong” is difficult to act on. “The preparation bench will be in my shadow” gives the team something to solve. A focused review can work through those problems in order while keeping useful completed work.
Take stock before buying
Walk through the spaces and describe the problem in ordinary language. “The dining area feels exposed” is a more useful starting point than “we need a better pendant”.
Separate the important changes
I prioritise decisions that affect function, access and future options. A badly placed control or inaccessible driver may deserve attention before a decorative choice.
Some problems can be resolved with aiming, a different optic or another lighting layer. Others need a layout change. Test a reference fitting where possible before committing to more work.
Bring the team back to one plan
Agree revisions with the people delivering them. Record changes to fittings, circuits and controls in one coordinated brief, with costs and responsibilities understood.
The revised plan should make the next action obvious: move this point before plaster, keep this fitting, trial this beam or confirm this control combination. Give each unresolved item an owner and a deadline. That lets work continue with fewer assumptions and makes the scope of the rescue clear to everyone involved.