Can lights from CB2 can be tucked behind plants or in corners to light up a specific area in the room. If $20 is too steep for your budget, Lamps Plus also has similar cans for a few bucks less.
Candles on the floor can be a fire hazard and come off a bit cliché, especially with Valentine's Day right around the corner. But we like the look of these oversized silver hurricane lanterns, big enough to case huge pillar candles. A similar candleholder: Pottery Barn's Capri Lantern.
Ikea's Grönö lamps are simple and discreet, ideal for placing on the floor without cluttering up a room or hallway.