Hi Freddie, thank you for purchasing our product. We noticed that in most of the cases where this issue happen, there is a light source placed near the transformer's photocell, resulting in the light system to flicker On and Off. Often, it is because the light fixture of the circuit is placed too near of the transformer, darkness making the light go On, but when turning On the light, it affects the photocell which then make the lights go Off and so on. Please verify if this is the case by putting a black tape over the photocell (on the left of the digital controller) or making sure there's no other light source nearby the transformer.