I have always watered in the first few hours of “lights-on”. My plants start drooping before “lights-off”, which Rasta Jeff says may indicate the plant has reached it’s DLI, and are perky in the early hours. And the first indication of over-watering is drooping, so I read that as the plant not wanting anything at the moment. IMHO it appears the plant is more receptive to water/feeding early in it’s day.
Anyway I’d like to hear thoughts on when to water in the daily lighting cycle.