Help me Understand Defoliation and Pruning around 17-21 dayscof

Every leaf on plant will capture photons of light and store the energy and carbon captured for use later. Every leaf you remove will reduce the total amount of energy that can be captured in a cycle. Lollipopin should be done prior to switch. Sugar leaves, also known as cannabis sugar leaves, are not particularly efficient at photosynthesis compared to the fan leaves on a cannabis plant. The fan leaves, which are the primary sites for photosynthesis, are larger and have a greater surface area to capture sunlight. Sugar leaves are smaller and less efficient at converting light energy into chemical energy through photosynthesis. Greatly diminishes plants ability to perform gas exchange among other process. Best advice for any new grower is just let her grow, watch how she defoliates herself naturally, then next grow you will have a better idea of what it is you are expediting with defoliation.