In central Louisiana we often feel the effects of major hurricanes and with that comes the power outages that could and have lasted several days.To supplement my flashlights I purchased a Streamlight Siege and two UST 30 day lanterns.I have to give a big thumbs up to these lanterns.They use D batteries,several modes,and up to 300 Lm with long run times.I feel like I have the "lights out" problem covered.I also have a couple of wand type diffusers for my flashlights for walk around in the house and not stepping on the cat lights.