Using these light bulbs is easy. Simply screw them into compatible light fixtures. You can use them indoors or outdoors, such as in camping tents, on roofs, or in your garden. When using outdoors, make sure the fixtures are protected from heavy rain. For maintenance, turn off the power before cleaning the bulbs with a soft, dry cloth. If a bulb burns out, use the free replacement bulb we've included. Store any extra bulbs in a cool, dry place to keep them in good condition.