These solar inflatable lanterns by Luci are invaluable. They recharge in 7 hours and then give light for up to 24 hours on a single charge. They also have a USB port for alternative charging. Each has 10 mini LED’s and produce 75 lumens. One Box has provided 160 of these to students and teachers for use during blackouts, civilians in villages with intermittent or no electricity, and to some of the Boys at the front who spend a lot of time underground where there is no power.   Cost? $10.