We all know that any bulb without electricity is nothing, but a junk. Can you light the entire area, transferring energy from one bulb to another and choose the correct route?
Switching one bulb won't cause any difficulties for people who play this game, but what about if you need to light them all? Not all chains are correct and you should pick the right one. Look at the screen and try to figure out what will be the best sequence to light all bulbs.