Those are heat lamps, not lights per se. You will only need them on if you have something to warn, assuming you have a warming shelf.

AHA! Thanks! I don't think we have a shelf but I will ask DH.

I must say I can't wait to get my CC range top! The best thing about our rental place is the gas stove, a real flame-thrower (11-year-old Viking) compared to the gas stoves I grew up with. But the sealed burners are weird. It's going to take a while to get used to a pan full of onions all browning along the outside with a clear circle of gently warming onions in the center.