There is a set of high voltage wires outside my window, which is horizontal and parallel to my livin

The radiation effect is negligible, and radiation protection is not required. Under normal circumstances, 5 meters away is safe, but there are also measures to prevent electric shock. For example, when the line is hung by the wind and the metal berth can be conductively packaged, so that the line is less than 2 meters away from the balcony to the ground, it is very dangerous!

Seeing your description, it should be that the heating duct design is unreasonable. >>>More

It doesn't matter, just sweep it away.

Use three single-control switches to control these three groups of lights, connect one contact of all bulbs with the neutral line, and lead the phase wire to the normally open joint of the switch, and then guide the wire from the normally closed joint of the switch to the lamp. >>>More

It's so far away, it doesn't have any impact on your home, so you can rest assured.