I agree with Jonathan, make sure you have dimmers so that you can vary the level of lighting. You need to consider different layers of lighting; pendants and downlighters will throw light down, whilst uplights either on the floor or walls will throw light up and illuminate the lovely beams you have. And don't forget lamps will throw another dimension in. Having the ability to vary these using dimmers gives you lots of versatility to create different moods depending on what you are using the space for. You may want to use some spotlights that you can angle to wash light down the walls or highlight a picture. If you can stretch to it, a system like Lutron gives you greater flexibility over what you can achieve with your lights. It's basically a super-duper, all-singing dimmer switch that can allow you to program different moods according to how you are using the room. For example, when eating in your dining room you may want some downlighters on a low setting providing a background ambient light whilst the feature lighting (ie. pendant &/or picture lights) are slightly brighter. It's the combination that will make it much more warm & inviting. Have a look at books by Sally Storey of John Cullen lighting (or their website) for more inspiration. Your 3rd picture was of Bocci 14 lights. These come individually or in groups (some custom made installations of these involving hundreds look absolutely incredible, with a price tag to match!). The actual dimensions of each ball though is only 10cm, so you may find you need quite a few to give you enough light & wow factor. We have used 2 of these chandeliers by Flos to light a similar space: http://www.davidvillagelighting.co.uk/product/Flos_2097_30-Arm/219.

That looks like another big project to get stuck in to! If you need any help with finding suppliers do get in touch - we also have an event in London this weekend and Harrogate in a couple of weeks should you wish to pop along - tickets are free in advance and you can find out more info at www.lpoc.co.uk/property-show.  Good luck with all of your incredible projects

Thanks for the comments, I like the idea and have considered an upside down house but have a very large dog and spend most of the summer in the garden, l like to relax and eat outside etc. so unsure if running up and down the stairs would suit me. Really like the idea of dark windows and would like to change the eaves and barge boards as well. I'd like to open up the downstairs either side of the stairs and put the kitchen in the existing bedroom and bathroom with doors out to the garden. As you can see the garden is to the side of the barn. Hoping this won't spoil the outside! Upstairs I want to take the ceiling out so its open into the roof exposing the beams and create an onsuite and dressing room! Turn the old kitchen into the 3rd bedroom and downstairs wc.

What a transformation! Who would have thought that the exterior (what is that...brick, stone?) would clean up so nicely! And the stable doors are a lovely touch!