My houseplants keep dropping leaves only after I switch to LED grow lights—what gives?

I recently swapped out my old fluorescent tubes for new full-spectrum LED grow lights in my indoor plant corner. The setup is in my north-facing living room where natural light is scarce. Since the change, a couple of my favorite plants - like my fiddle leaf fig and a snake plant - have started dropping leaves daily, which never happened before. I’ve double-checked watering routines and humidity, and those haven’t changed. The LEDs don’t feel hot to the touch, so I don’t think it’s heat stress. Has anyone else experienced leaf drop after switching to LED grow lights? Could it be the light spectrum or intensity? How can I adjust the setup to keep my plants happy without going back to fluorescents?