Hi! I am self-installing some 8' LED rope-like lighting in my basement on the ceiling. I have 3 of these 8' lights, which will be joined by 2 12" connecting cords. There is an option to wire these connected lights into the main lighting, but I don't want these to come on every time I turn on the room lights. The lights came with a 60" electrical cord (with an on/off switch in the middle of the cord) that plugs into a wall outlet so that I can turn the lights on/off as I want, regardless if the main lights are on or not. I have a wall outlet that is half way up the wall, but the 60" isn't long enough to reach from the lights to the outlet. Simple question here: is it okay to use an indoor extension cord?