Solar panel: Outdoor use only Lights automatically turn on at dusk and turn off after 6 hours
Plug: Outdoor or indoor use
Built-in timer: 6 hours on, 18 hours off
This is a solar product and it requires sunlight to be powered. The length of time these stay illuminated depends on the time of year and weather conditions. They will still work in winter but only for a couple of hours from dusk. Approximate lighting times are: Spring = 2 - 5 hours, Summer = 5 - 8 hours, Autumn = 2 - 5 hours, Winter = 0 - 2 hours. This product will not fade when the built-in battery becomes weaker. The product will simply stay lit for a shorter period of time.