We had our kitchen / diner extension done last year and we spent quite a bit of time thinking about what we were going to use it for.
Not just it's a kitchen and dining area, but eating, entertaining, just sat talking etc. It's a big space and we also went with a vaulted ceiling, skylights and bi-folds.
We also built a false chimney to sit the range in and the lighting of that was also considered.
Also think about the space outside, do you intend to use it of an evening ? Perhaps put some external lights in. Maybe a security light or two. Well worth doing now while the sparky is there than retrofitting or wish you had thought of something.
Also, the switching - we put a bank of switches at both ends so most the lights can be operated at both ends of the kitchen with the exception of the lighted display cabinets (one end) and the external lights (the other end). Not as important as you can swap and change once the fittings are in but when thinking about the use and what light works best also the colour of the lighting as in the tone (warm, cold white, neutral etc.
We went for spots (10 in total in the main part and another four in the snug area). They are "cool white" and exceptionally bright.
The hanging fittings we sat across the area we knew we were going to have the dining table and have a much warmer / dimmer bulb and feature / shaped filament bulbs
Where the vaulted ceiling meets the existing gable it's almost 5m high and a big space so got a large (1.1m wide) uplighter with a very warm hue and washes light up onto the wall. Tbh this is used 90% of the time
As above the false breasts has a large very white led fitting with the extractor and quite nice to have one with no other lights in the kitchen. A very different feel to the space
We also decided to put spots in the top of the glass fronted display in the snug area. Again gives a really different feel to the area and nice if you want to sit on the settee there and read / browse your phone
We put three cheap bulkheads in the back either side of the bi-folds and next to the utility / back door (there's another the other side between the two windows too).
Great if entertaining / sat in the back garden late or just some extra light if in the garden in the darker months (even putting the books out!)
And just a few more pics
The mix of lights / options gives so many feels and different ambiances to the space - definately worth taking time to think through.
Also, talk it through with your sparky, we did and some of his suggestions were great and he's done this loads more times that we will ever do!
Also, do the same with sockets - we thought we went completely OTT but again thinking through it made sense and we ended up doing things like a double socket in the island with USB ports for charging phones, power to the island for a beer fridge, socket in the tall lader unit so we can put the microwave in there and keep it off the worktops.
Bit of a waffle but hopefully give you some food for thought