In real life, I DON'T have a light stashed everywhere in the house, car, etc.....mostly in my pocket(s), a kitchen cupboard, the glove compartment, and a tool box or two.
If I go to bed, I take the stuff out of my pocket anyway and put it on the nightstand.
I don't have any lights on a shelf, or otherwise stored in a "collection"...every light I have goes to work with me/has a job to do SOMEWHERE.
When I would replace a light with one that worked better/took its place in the rotation, I would chuck the old one/give it to someone else, or save it as a spare if it were still useful (Most of the tool box lights, etc...).
Example, I had an old Inova T5 UV light I used for forensic work...it wore out, and Nite Ize honored the lifetime warranty, and replaced it, sending me a brand new, current model Inova T5 UV light.
Well, its a perfectly good light, but, while it was out for repair/replacement to Nite Ize, I received an XeLED UV light that worked better in the same wavelength, and a Tank007 UV with a 365 nm emitter, and these worked better than the Inova for my purposes.
The Inova will most likely be given to one of my techs (Got it back today), or put into a tool box as a spare UV light. They are tough as hell, the old one was banged around from ~ 2003 - 2012 or so, and only the switch wore out. With a life time warranty, it still has value/use....probably last another decade, etc.