I bought 2 Colorchanging Amberbrite conversion kits for my old 120V pool Lights. BOTH lights have the same problem: when I apply power they momentarily "flash" then won't turn on. I have to wait a minute to try again, or they won't even flash once. Do I really have two bum lights (hard to believe) or is there some controller I need to install? Or? ( One lamp misbehaved on the bench, so I never installed it. The second Lamp worked on the bench. I installed it. It ran once and then the second time I used it, it started the "flash and the refuse to light" behavior). In the dark.