I use this system to control lights and warmers in a Dairy Queen. The outside lights will sometimes be turned off by something external. We can turn them back on using either the PC or the X-10 switch and in about 5 min. they will be turned off (sometimes). We did just have our drive through board replaced and I think it uses T8 bulbs with electronic ballasts. The DQ is not close to any houses that might interfere.