You can have a different smell very quickly as you don't have to worry about full burn like you would with a candle.
You can try different scents in smaller quantities before buying a larger candle.
If you are worried about forgetting your lit candle then wax melts are the thing for you. Once the tealight burns out it extinguishes itself and the wax will solidify once again. Tealights burn for about an average of 4 hours.
All our wax melts here at allabouteveshop are made from Soy Wax.