I use it mainly for aesthetics. I have a Moonbeam Light, which is an LED attached to loc-line so it is adjustable. It wasn't one of the cheaper lights out there, but I like it. It shines pretty bright, and if spotlighting something in particular, it shines 6 feet. I angle mine up into the reflectors, so it gives a nice shimmer.
But, no you don't need one. They do look nice though.