The reason the bulb was burning out was because the wire that comes off the Uv ballast was crimped in several places. I had run a dedicated transformer without thinking to replace the ballast, but the light was dim and as I was going to replace the ballast the transformer I put in overheated and popped. I removed it ran new ballast and wire and connected them to r and c out of the board. The difference in the light was extremely evident. Unit operating normal.