i was looking at your pics and noticed something about thermometer placement. if the light shines directly on it you will have false high readings. i made a little cardboard "hood" for mine and it worked fine. the thermometer will absorb the heat from the light if it shines directly on it. someone can correct me hear if i'm wrong but i believe this is called transfer heat and plants can tolerate that alot better than a high ambient temp. it's like when you stand out in the hot sun at noon on july 4th and your skin feels like it's alot hotter than the air temp. i hope i didn't take a real simple thing and confuse everyone with my poor explanation.