Quel horror! The glowsticks all conked out after an hour. Hoarding of leftover holiday items to the rescue - little battery operated tea lights we purchased for Halloween so the pumpkins wouldn't burn down the house with candles - then Halloween got crazy and we never did carve pumpkins, just let them sit in full vegetable glory on a bench outside. These work even better. Look out, late night dog walkers! (Our little skittish dog was thoroughly unimpressed).