Hey SAC87, I have been reviewing your journal through the flowering weeks. Your problem that led to the "Buds not Fattening" began between weeks 10 and 11 when your PPMs jumped to 1040 - It was too much, You unknowingly created an imbalance in your root zone that led to a partial nutrient lockout. Then you compounded the Issue with High daytime temperatures and Increasing the Wattage without much change in the Distance between Lamp and Plant.
Looking at the Photos, your plants began showing intervienal chlorosis and up curling of the serrated edge shortly after you made the changes to your Grow environment (Bulbs, pH pen). As the weeks progress after the initial insult to the plant, the Increased wattage and temperature began burning your leaves as demonstrated with the darkening color and crispy textures that soon became Yellow/Light brown. The damage to the leaves significantly impaired your plants energy production causing the flowers to stall out compared to previous gains. The appearance of Banana's as you have described further indicates excessive plant stress that is causing hermaphrodite'ing - At this point, I am sorry to say but You might have already lost the Battle.
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