I bought these.
http://www.ebay.com/itm/5050RGB-led-...f4457c&vxp=mtr
The usb cable is extra long. Currently used with a usb power pack like below.
There are many combinations and varieties to play with.
My next idea is one of these connected to a 7.4v magic shine style battery pack. Basically a taillight with a remote control switch.
http://www.ebay.com/itm/Mini-RF-Wire...item58a0db7b55