I completely agree with OMEGA. You'll want to get within that range of temp. to make sure your bedroom stays warm and welcoming. The best thing about using LEDs for cove lighting is they last for years (because, let's be honest, who wants to climb back up to the cove area to replace those lights??) and are very energy efficient so you can leave them on for long periods of time. You'll also want to try to stay away from rope lighting. We've had quite a few customers who have had issues with even light distribution when using rope lights and have been quite happy switching to LED strips!

I am not sure I understand the question? There might be directions on the internet for faux wood finishes. A black glaze can help:

you can go for the wall panelled tv unit on the left side of wall and on to the right side of wall you can with light colored textured paint and make a collage wall.TV Unit mounted to the wall panel makes the entire space sizzling with drawers, shelves to display your artefacts.

The living room window itself does not appear to be designed to let much light through. Please show a photo of that window, also of what lies outside the window. In the meantime, I suggest that you replace the builder-installed window with one of your own choosing. Use toughened glass rather than this heavy grill. Minimise the frame, if possible, particularly if there will not be much air coming through. If there is the potential of air but not much view, then have a sliding or bifold window that maximises the opening. On the blank wall outside, if that's your view, put up a green wall, creeper, something to improve the outlook. For nighttime viewing, add mild uplights in a natural white shade, focused on the greenery. Or else, you may be able to put up a reflective surface on the facing wall, to bounce in more of whatever light there is. Such as a coloured glass mural if not a plain mirror. Once you have maximised your window, move on to the wall to the right of your living room photo. That is, the wall that your living room shares with the west bedroom. Use a very large mirror on that wall to expand your living room visually and to bounce more light around. To cut down on expense/effort you can make it out of several standard-size sheets rather than one giant sheet. However, if that wall is to be covered with storage, make sure the front surface of the cabinetry is fairly light-coloured and reflective. Last, if not yet satisfied, consult a lighting expert for this room. That would be useful. These are fairly expensive solutions, all in all, but they should help.