I replaced our incandescent bulbs with cheap led ones. Every time I turned on bedroom lights, over the air tv went blank...led bulbs produced radio frequency interference. His was confirmed by a friend who was a retired Chief Engineer as a local tv station. Also, the cheap bulbs burned out too quickly.
I found these bulbs in Ebay:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Volts range from 12 to 14 and they do not interfere with tv signal. Also much brighter than cheep ones. Nice warm color.