This is the ticket. You can gorilla glue all the lights with straight sides to the wall head first, extending each one of those shelves infinitely. This turns each one of those excess lights into additional space for 2 or 3 MORE lights!
Definitely don’t do this either.
Nice display and collection of flashlights L4M4!!!
Hopefully those shelf screws are screwed directly into studs. 
“Airplanes” starts playing in the background as the walls start to crack…then when the shelves start to fall in slow mo, the lighting fades to dark and the lights fade on as the chorus kicks in, with an action zooms out to l4m4 diving to catch the lights as they fall…
Oh man i can see the whole scene unfolding in my head, the lyrics are perfect for this situation LOL. There’s even verses to go with falling 18650’s, “simpler times than this, pandemonium unfolds” LOL
Sorry to disappoint you, but I live somewhere where the buildings are made from stone 