These LED lights provide a nice warm glow, inside or outside. After a full recharge, they will stay lit for 8 hours, so you can hang out until the wee hours with your friends if you like.
Safety? They are cool to the touch and won’t (like candles) leave soot marks on your walls (or your lungs).
Expensive? $50 for 2, $80 for 4 or $150 for 8. Seems reasonable to me.