Not sure 'bout a secret, but I chose insigne because it likes cooler temps. I also keep it on the bottom shelf of my grow stand, just inches from the floor. The lower portion of my apartment near the floor gets significantly colder than the rest of the place, cold air sinks and all, so this plant and my P. villosum hybrid get a significant temperature drop at night, especially this time of year.
Thanks for the photo comments. I'm getting better with my lighting. I still under expose the shots a good deal because my tripod is not sturdy, and sacrifice light for clarity.