Lights are very important in a room. I always thought that even if you have an almost empty room, it can still look great with the right lightning.
Vintage chandeliers, desk lamps, wall lamps, floor lamps etc. are probably the easiest things to find in a flea market, in a vintage shop or on eBay auctions but if you want a very nice one from a famous designer you’ll probably see crazy prices around; doesn’t matter if vintage or new!