That is the way mine work as well. The lights are supposed to ramp up from one time to the next, so at 8 your lights would be off and then by 9 they should be at whatever intensities the channels are set for. I believe, and hopefully someone will correct me if I'm wrong, the reason you don't see the lights come on until 8:15 is because they haven't "ramped up" enough to turn the lights on. I haven't tried it but if you want the lights to turn on at 8 I think you can just change the time for that set point from 8 to 7:45.