Well, I was worried about it when I placed the transformer and sure enough. My GFI keeps popping. I have a dedicated outlet that has about 6' of wire between it and the panel. My lights fire up fine and cycle fine when I am there testing but sometime in the night the GFI kicks off. Only 6.5 amps on the primary. Transformer is a 1200 watt unit with a photocell. It has 4-300 watt circuits. I am reading between 17 to 20.5 amps on the secondary circuits. What have you guys had success with to overcome problems such as this or am I barking up the wrong tree? Thanks in advance for your input.