Hudin:
Household leds are led bulbs that are used in houses. Basically bulbs with leds instead of tungsten.i decided to use these led bulbs because it's easy to switch them at a very fast rate.
I plan to use on off keying modulation. For every 1 the bulb shall be on, for every zero it shall be off, this will happen at a very fast rate, that the human eye won't be able to notice.
Household LED bulbs are not trivial devices. Typically they have a rectifier circuit to get from AC to DC, a storage capacitor to smooth that DC voltage, and a current mode buck regulator of some sort to drive the physical LED array. In short, they probably have enough power storage to prevent them from being switched faster than line frequency (50/60 Hz). The LEDs typically are blue LEDs stimulating a phosphor coating so the LEDs themselves have some persistence as well. I'd be moderately surprised if one can effectively switch them at a "very fast rate" from the power input circuit. Most likely they'd have to be switch at a rate that would cause unacceptably noticeable flicker.
In addition, switching AC at household voltage levels is going to be a bit of a challenge and potentially hazardous.
Using a separate low voltage infrared LED node deployed in each room is probably going to be a lot more practical and as noted up thread there is a great deal of prior art in the Arduino world.