Luminara is the most recognizable brand of flameless candle because it is the best!  I set mine to light at 6:00 p.m and have 5 hours of continuous light.  After 5 hours they go back off automatically.  Then back on the next night.  Runs on "C" batteries and they tend to last 4-5 months or a "Holiday Season!" Size is 3"L x 3W x 6.5"H