Week 14 - Warmer Temps Leading to Deteriorating Conditions???

Temperatures outside have slowly been warming into the 40s the past week. The larger affect on inside temperatures has been the 15+ hours of daylight. The sun shines into my floor to ceiling windows during the afternoon hours warming the second floor grow room into the lower 80s. I have also added a couple hours of grow light - now running at around 14 hours/day. The affect of this has been a return to rapid leaf loss on the pepper plants. There also seems to be a direct correlation between the number of peppers on the plant and rate of leaf loss. The pepper plant that has the most peppers (30+) is by far the barest of the three. Meanwhile, the plant that has mainly flowers (just a couple peppers which just started to form) is still quite bushy and is holding on to most of the large leaves at the bottom (which seem to be the first to fall). The third plant is in between these two, with some peppers and moderate leaf loss.

The herbs all continue to do well. I have been taking the Basil in and out of the grow area because brown spots have been showing up again. I'm assuming this is due to an overabundance of light.
The health of the plants improve after sitting in natural light for a couple days.

Note the difference in amount of leaves on the pepper plants with the bushiest plant on the left and the leanest on the right.

I take them out of the grow area every few days to clean up the fallen leaves and manually pollinate the flowers. 

The bushy plant is a solid 21" tall (3" of growth in the past week). There are tons of blooms on this plant - I lost count in the 50s! My guess is as soon as peppers start forming leaf drop will rapidly accelerate.

This plant now has over 30 peppers on it. Note there are very few leaves left at the bottom of the plant.

One of the largest peppers measures just shy of 4" long.