Update time! (oops couple of the files are a bit larger than I thought they were.)
I made some adjustments in the last couple weeks:
I have had to move the lights higher as the plants have grown. I also swapped the lights around. The larger plant in the larger pot now has the 42w CFL light over it. The 26w CFL spotlight is a bit weak and I had to move the light higher as the tips of a few leaves were bumping into the glass and browning at that point. I moved the 26w CFL to the plant that was suffering. It's a little cooler since it doesn't have any foil around the fixture, just incase one of the problems was heat buildup close to the top of the plant. I also gave the smaller plant a fungicide drench and have been careful about watering and keeping it on the dry side incase it was a root rot issue. Watering just a bit from the bottom until I could just see a tad bit of moisture (color change) in the peat bits at the surface.
So here are the updates after 2 weeks since the last photos.
Small plant first..
Overall shot. Looking healthier and it has resumed growth and the new leaves are a nice green color and are increasing in size again. The longest leaf is 7cm and has a tiny bit more to unroll.
Close up of the base. You can see the improvement in color as well as the much better looking new leaves, and the continued production of new leaves in the center. Still not entirely sure if it was a pathogen or environmental .. or both?
The plant in the larger pot. Largest leaf about 15cm now. You can see the tips of a few leaves that got fried against the glass.. Rather have a few tips get a bit toasted though than not give the plant enough light. The plant is also large enough to hang onto houseflies all on it's own. They grow up so fast /sniffle
Close up of the base. Just to note the increasing rapidity of leaf production. It's interesting when they first grow the newest leaves don't start unrolling into the previous leaf is nearly all extended. As they gain size the leaves emerge at a quicker and quicker pace. So much so that each subsequent leaf is only slightly behind the previous leaf. Note the leaf only a few cm. unrolled so far and 2 new leaves now emerging one right behind the other.