Defoliation for air flow is always one of my top priorities, light exposure is important but not as much as for air flow, but at this late stage in flower, I would not defoliate for light. Tucking is always a possibility.I wouldn’t defoliate your solar panels. Plenty of air flow with fans is crucial as the flowers bulk up. I run 4 fans in my 2x4 for example. She’s looking good.