dude , if ur doing interior neons ,a nd their going to a switch in the dash or ect... all u have to do is make sure the switch has a power source and a ground... , u can do it a number of ways , u can run a direct power line form your battery to the switch , and ground that , or if u didnt wanna use the battery , you could always rout the power wire through a fuse in the fuse panel that has a constant source of power... neither way would effect the life or ur battery , its just which way u would rather do it... underglow , how ever is alittle different cause u need the power box that connects to ur battery as well , and form my dealings with under vcarriage neons , their closed circuit connectiosn , meaning that u have to have all hooked together inorder for any to work... its still pretty easy.. any questions , email me at Cools476@aol.com , or im me there as well.... its not worth paying anyone to do it for you..