Constant intensity vs daily cycle

[BWG139]

I'm not sure my title does this topic justice so allow me to explain. While looking into lights I saw a seller suggest an LED controller for a daily light cycle. By that I mean the intensity slowly ramps up until midday where it stays for a few hours before slowly ramping down. My aquarium light does similar, albeit with sunrise and sunset each condensed to an hour. I can see the benefit this would have for animals, and this seller does sell for the vivarium community, but does anyone know if this has an noticeable impact in plant growth? I'm just curious because any listing of foot candles are given for natural lighting which isn't at full intensity throughout the day.