The lights are already at 100%. Would it be productive to bump the room AC up a few degrees while the lights are on?
Yes. You could add an incandescent light or two, as well.
Running a dehumidifier at night is what i do or I get the same results as you.
Once lights go out and the temperature drops, my RH goes up.
If you dont have a dehumidifier, then runner a heater when lights are out can help.
Cold air can’t hold as much water as hot air so RH goes up as air cools, keep air warm and RH want change.
For example, if air at 70°F has 50% RH, it means the air is holding half of the moisture it can at that temperature.
If the temperature drops but the moisture stays the same, the RH increases because cooler air can hold less moisture.
If the temperature rises, the RH decreases unless more moisture is added.
This is why warm air often feels drier and cold air can feel damp even if the actual moisture content hasn’t changed.
You don’t have to use the 1.14 gallon tank internal tank. I had a vegetable drawer from an old fridge we just replaced and ran the hose to it. Keeps from triggering the auto shutoff which is frequent - once every day. Less work.