I just bought two sets off ebay, 5m reel, waterproof, cutable every 3cms i think it is, can rejoin by simply soldering them with wires and putting some silicone or some sorta weather shielding around it, has a remote with a shitload of colours and flash settings etc
cost me around $30 i think it was
ended up putting one set around a big canvas for my sisters room via a AC/DC converter
still have one set sitting here but cbf putting them in the car
looks like this
I know some people say dont trust ebay stuff but they have been in my sisters room for afew months now used every night and no problems