There is a simple solution to your problem @Cannarose when the lights are off inside the tent, turn the lights off outside the tent in the room it is situated in. Use a blackout blind for the window or black out curtains. If your tent is a twin room use mylar/ any reflective grow room sheeting or duct tape on one of the sides to prevent light coming through.
Sorry to hear your situation, at least you spotted it before wondering why your plants were going hermie at week 5 of flower, better to know now than later.
Thanks for sharing your findings with us regarding this equipment. @madscientist @LemonadeJoe may be a link to the thread about equipment reviews needed here ?