If you have a smart phone there is TV Antenna Helper as mentioned above and iPhone has a similar app but you will have to do some searching. www.tvfool.com will allow you to enter a zip code and find the local TV towers as well. My favorite device is the Winegard Sensar Pro (also mentioned above). The Sensar Pro generally just replaces the Winegard wall plate with the on/off button/switch. You don't have to worry about a TV signal meter (since so many don't have one anyway) but instead just turn on the Sensar Pro, raise the antenna and rotate until you find the strongest signal. It takes about 10 seconds.
The thing you remember seeing with the LED lights is the King Control's Jack antenna which is a complete replacement for the Winegard Batwing and not a replacement for the handle.