One trip down the lighting isle of any big box store and you see the perplexed looks on prospective buyer faces. It is just TOO much confusing data to choose a light bulb anymore. LED colors have come a long way from the early blue "Am I in the morgue?" look. It gets better and better as each new generation of lamps emerges. Sadly, you can't tell by the label conclusively what you will get. You have to put one in your fixture to see what it does and how YOU like it. Yes, LED saves huge amounts on electricity because, simply, they are lower wattage. They last far longer than traditional bulbs and the prices are falling, however, the payback time on the electricity savings takes a while. Over the life of the lamp, you will save on the total cost of light. LEDs are not light bulbs. They have components called drivers that can sometimes go bad so remember, it's not always the lamp itself. Not all LEDs are created equal. Not all LEDs work will all dimmers. Some, despite claims, don't work on dimmers at all. So Caveat emptor. Know the brand and check with the manufacturer if you aren't sure. You may decide on an integrated fixture. Not a bad idea, however when it goes out, you replace the whole fixture. Remember that LED is NOT the only or best lighting solution in many cases. There are few LEDs that can rival the crisp, elegant look of halogen lighting. Under cabinet lighting is perfect for LEDs but get the color temp between 2700K and 3000K, which is what most humans prefer. For garages and closets, LED is a GREAT choice. Personally, I put dimmers on EVERY switch, in the walk-in closets, in case you want your robe in the middle of the night, in bathrooms, and especially in living areas. If you stay with incandescent, dim them way down and they will suck less energy and last a lot longer than their rated life. Be careful dimming fluorescents. They often buzz when dimmed. If you are looking for MR-16 LEDs, choose Soraa. You will pay a handsome price, but you will get the most magnificent LED light available. The inventor of that lamp won a Nobel Prize for it. Since almost all LEDs are made in China under various labels, be careful. There are quality differences. If you go cheap, you will give up features and might not get the color you are looking for. Even name brand companies have had massive recalls. There's almost too much to know just to just run out and buy a light bulb anymore. If you have a lighting showroom nearby, drop in and eyeball different lighting vignettes. They should be able to advise you on color options.

Does using 19mm high performance glass make enough difference? What about using a system with frames to use double glazing? Sure it's not frameless but it'll make life a lot easier. What about a combination of different glazing systems from south to north? Or as noted before reduce the glazed area. Rather than full height drop the height down to reduce the area. I'd still change designers though because if this hasn't been considered until now what other hidden 'land mines' are there around to trip you up and lighten your wallet even further. A new (good) designer will go through the plans and assess what needs amending. Designing is complicated and complex and needs a lot of thought, planning and forward thinking.

Great photos! The lighting really does make all the difference.

I work as a colourist and the easiest method for a upmarket look is to choose an exact colour to match one of the colours in the tile. I would take the tile to a paint shop and get the colourist it match exactly one of the greys in the tile. Make the depth of the colour a light version. All white walls are on the way out. Lappatto tiles usually have some texture as they are semi polished. This is the latest look in tiles as they give a shine without the maintenance of polished porcelain which had been in. They are usually less slippery than satin or polished tiles depending on the brand.