Hugh,
Preppers encourage others to buy several Aladdin lanterns, along with mantels, fuel, and more for the collapse. I think that is now old technology. It would be better to get a number of the solar lights people use along their sidewalks. Just over the last year or so, the technology has substantially improved, with lithium batteries, et cetera. They will last forever. In the great collapse, put them outside to collect solar power (making sure no one steals them), and then bring them in at night for light by which to read a good book! Incidentally, they will make good barter items. Preppers encourage others to collect 22 LRs, TP, and lots of other things, but I think these solar lights would make the best barter item of all. God bless and keep up the good work. – Chap