This may be a dumb question but I just want to be safe. By tapping into the cigarette lighter that has the constant power to it, I'll be able to run my lights without the keys in the ignition? So if I happen to forget to turn them off, they will just stay on, and not turn off with the Jeep correct? Now since they are connected to a constant source, even with them off, will there be a drain on the battery?