I have some experience with the Goal Zero Luna light. I like using them with the Brunton powerpaks. Its like a portable lamp when set up. My most used power source is the Duracell 600 powerpak which is a 7 ah 12v. battery set up as a small inverter jump starter radio light unit. By combining 2-3 of the Brunton solar panels it can recharged but mostly I use a small 2 amp battery charger. I’ve used the Duracell pak with a small 12v. pump to transfer fuel to a 100 gal fuel tank and it knocks the battery down to around 40%. If the grid does go down for any length of time all this stuff would be incredibly useful.