These lights are Kichler hardscape step lights and mounted and installed professionally through a stone wall. They are wired to a 300 watt multitap transformer and the other two lines work fine. The first in the series won't light up (even when a new working fixture is installed), the other five run dim and flicker. Tried replacing the first light. No go, wired it directly to the feed and it worked great and bright. Wired it into the second light station and it ran dim and flickered. Kichler customer support had no advice. Any takers?