This is the finished DIY Closet Greenhouse, now lined with Mylar. Humidity increased to 55%, heat maintains at 84F.
As a disclaimer, I am between jobs at the moment so I am able to monitor the closet. The light, humidifier, and fan are connected to an surge-protected extension cord that is unplugged every time I leave the house.
I do not leave the lights on unsupervised.
https://i.imgur.com/2SAyld2.jpg
https://i.imgur.com/ft0Vw1G.jpg