under T5's.
One group - doing much better - is about 15 inches under and also gets some shade from bigger plants. Temps max out at about 72f. This group also gets a bit of indirect midday sun through the basement windows for about 1/2 hour.
The other- about 8-10in under, with no shading. Temps reach into 80's.
My conclusion, after the above experiment for about 9 months, is that they prefer lower light levels and lower temps.....however both groups flowered and have lush leaf growth !