Maybe the lamps were old and she is trying to freshen a room up. I would just donate a few of the old lamps that you both agree can go. Small items like lamps, tablecloths, etc can give a room a fresh, nice look.
This ^^^
Just because you have lamps, doesn't mean you have the right lamp for the room/task. The right lighting is important and maybe it's time to get rid of two of your old ones - no need to add to the clutter.
I insist on buying the daylight bulbs, they are a bit more expensive, but oh what a difference they make for reading and projects. Your eyes don't tire as quickly either when you read for hours.
There is something to be said about having nothing in your house that is not useful or beautiful, preferably both in one.
Besides, a new place begs for a few new things, it is a universal law:)
I get it, you sound a bit like Mr. R. who needs nothing - no replacements and he'll do without or tape it up - whatever, it is serviceable, right:). I go along with it for awhile, sometimes it actually amuses me - just think of the money we are saving:), there is always that.
But then I've had enough - I want a place that makes me happy and inadequate lighting, furniture that is clearly in need of replacement is upsetting for me to live with over the long term.
I also need the occasional pretty thing that makes me smile or spruces up the place.
Current case in point - umm, that kitchen lamp has two busted thingies that are not replaceable - we do need a new light fixture - eventually. As in when I go and buy one, maybe when the third of the five thingies breaks - he's clearly rubbing off on me.
As far as the one in and one out rule - I adopted that concept for my books, because they were creating a space problem at the time. I found it hard to do at first, but is has become my new modus operandi, it works!
I have never understood why people hang on to old lamps or furniture or whatever - it does not make sense to me. Give, donate, sell - I don't care.
There was a reason I replaced it - I want it the hell out of my house.