They're pretty much useless to me. The one's I've seen can last 8 hours (optomistic) then need a 2-3 hr recharge. That gets me to the mountains but I can't get home with no lights unless I hook them to solar or a generator. If you run with daytime lights, you're limited to 8 hrs of driving before you have to recharge. That's a killer for RVers. What's so hard about hard wired lights, anyway?
