How do I split/add a box for my current wishy-washy (over my kitchen island) to accomodate two overhanging lights? The current fixture is attached to one electrical box, but the pendant...

The current fixture is attached to one electrical box, but the pendant lights that my wife requests will require two boxes (I assume).
Answers:    Grab a few wire nuts and another box and 15 amp electrics and find the closest stud in your ceiling implicit where you want it and gross the hole, fasten the box. Use a special box if your fixture will be pouring. run the wiring from one box to the other beside the power off! punch out the disk for the investigational wiring to run in the box departing a little more telecommunication to work with. cable the new lead in next to the black wire to black, white rope to white, ground to ground with telecommunication nuts. use mounting brackets from your new oil lamp and install it to your box, connect new table lamp fixture, put in place and that's it.
I own the same problem, what's your wife's mark.... A couple of approaches. YOu can use a track light and use the current box to attach the power run out of the track to. Then pendant down where on earth ever you want or ,
you can locate the joists, over the counter plumb up (I use a lazer plumb bob but you can do it from the top down) locate where on earth you want the lights. You want to locate the lights between the joists and not subsequent to one. Buy either an hoary work box to hang on the drywall(should be fitting enough for most smaller pendants) or a box holder made for ceiling fan etc that have a pub that you tighten into the joists on respectively side. Cut the hole precisely, remove the existing light, insert a chain through the box and stick your arm through the new hole and hopefully find the flex. you may have to receive a wire hook or something to grasp the wire next to.
stick the wire through the foreign box, install it in the ceiling and do the connnections. This assumes you hold some attic space and the distance between the old and strange lights is not real long. It's not a pretty commission but doable.