I think this is a great idea when you live in rented spaces and if you are prohibited from changing lighting or doing any electrical work. Using the lowest wattage bulbs will create permanent sexy mood atmospheres. Hallways and nooks or certain areas of the room that serve only an aesthetic function would benefit. I can see this done if you have a vignette that doesn’t really need a bright light but an area that would look wonderful lit at night in  a subtle manner.