Soltech lights have an LED chip (rather than a bulb) mounted directly to the aluminum housing and cannot be replaced.  If used for 16hrs/day the Aspect will last 15 years or 90,000hrs, the Vita 5 years or 30,000hrs, and the Highland 8.5 years or 50,000hrs. You do not have to replace bulbs or any components of Soltech lights.  If the light burns out for any reason within 3 years of the purchase date, just return it to us and we will send you a new one.