Came across this in a link on Jack Mountain Bushcraft's site. Never have seen anything like it. Thought others would be interested. Solar firelighting tool http://store.sundancesolar.com/sospliposiso.html
C Solar firelighting tool http://store.sundancesolar.com/sospliposiso.html
It's useless at night though. A magnifying glass would probably be just a useful and would take up less room too.