Bio Sculpture® Complete 9watt UV-A Lamp is a stylish and rugged UV curing lamp that comes with a two minute timer installed and a removable tray that can be placed upside down for pedicure services. Two Single UV-A 9watt/78 Phillips® Bulbs (included) will cure Bio Sculpture® Gel in two minutes. UV bulbs do not necessarily burn out; they just get weaker and weaker over time. Replace Phillips and Sylvania light bulbs approximately every nine months and other brands approximately every four months.