[onewhippedpuppy]

You're installing new lights in the living room, what are you replacing? If you're replacing lights with a few more new ones, you might be able to make use of the existing circuit. I would start by finding out exactly what is on that circuit, and see if you have room to expand on it.

If I'm remembering this right, you have about 1650 W to play with (110V * 15A). You want to add 8 * 40W and 2 * 60W = 520W. Add up what you have on the circuit now, subtract the lights you will be removing/replacing, and see if you can add on.

Otherwise, I'd yank the double pull breaker for the 220V range and use the hole for a new 15A lighting circuit. Leave the wires, that way you could always use the range at a later time.