With regard (or is it "with regards"?) to the first part of the question, I think the answer is pretty straightforward. Since we have {wovmoHbogh jan} for "light (device)" and we also have {chu'} "engage, activate (a device)", then "turn on the lights"/"turn off the lights", obviously needs to be {wovmoHbogh jan yIchu'}/{wovmoHbogh jan yIchu'Ha'}. And I don't think there would be any problem with extending this use of the verb {chu'} "engage, activate (a device)" for the nouns {wovmoHwI'} "light (lamp)"/{wovmoHwI' moQ} "light bulb" too. On the other hand though, I *do* wonder about how we would describe when we would flip the switch but the device wouldn't work because someone had cut the electricity (I don't know how you say it in english..). Would it be sufficient to say {'ul tu'lu'be'}/{pagh 'ul tu'lu'}? Could we say {'ul chu'Ha'lu'pu'}? Obviously electricity isn't a device which can be "engaged, activated" and "disengaged, deactivated", on the other hand though isn't it something which *can be* "engaged, activated" and "disengaged, deactivated"? ~ Dana'an "invoked or not invoked, the gods are there" (ancient spartan saying)