Ha glad this got a little bump.... Me and my girl did this today, it was pretty cool, a nice natural clean earthy hit, very fun/cool indeed. I really can't solar toke around here to much with my bong, the neighbors are kinda funny so I dont risk it but I managed to get a couple in to see how it was.
Once you're really good at auto-angling the magnifying glass, do it from the convenience of being inside your home through a window facing the sun.
Whatever UV filters are in windows seems to lower the overall temp of the sunspot burning your nug, thus making your smoke last even longer, taste even better, etc. The smoke will of course not be as thick, but you can get pretty dang close depending on how slow you inhale and how good your aim is.
I bet cloudy days and night time suck for those with nothing but a solar lighter huh.lol Back when I was a kid we called solar lighters...get this... a magnifying glass. Who would have thought about burning something with one.