Times 40 hours - single or double lights come on automatically when power goes off - single light option provides up to 40 hours of light on full charge - adjustable heads with long life bright led bulbs - maintenance free 6v rechargeable battery - no wiring, just plug in! - night light function option: photocell turns on soft led at dusk - portable, built in carrying handle - add safety lighting to your home, cottage, business - basement, garage, camping, safety exit, office.