Smart Solar 3784WRM4 Fiesta Hanging Umbrella Solar Lanterns, Set of 4, With One Energy Saving White LED And Rechargeable Ni-MH Battery Per Lantern 1 energy saving white led per lantern Charges by day and automatically illuminates at night Up to 8 hours use when fully charged Each lantern includes a replaceable, rechargeable ni-mh battery Please charge the item for 2 days in bright sun with the switch in the off position as well as remove the plastic security film covering the solar panel