How often do you change it?
I get the ramping up/down in a bid to replicate natural day light/positioning of the sun, however in natural environments there is algae. If you're looking to not have algae, then you'll need to do something a bit different than mimicking the position of the sun.
My point is, plants need balance. A balance of light, co2 and nutrition. More light means you need more co2 and nutrition, more co2 means you need more light (and nutrition) etc...
If you are not injecting co2, then in your closed system that is your aquarium, you will have a fairly level amount of co2 available in the water column throughout the day, produced by fish and bacteria waste and gas exchange at the surface. Same goes for the amount of nutrients available. By ramping the lights up/down constantly throughout the day, you are creating inconsistency, and the three resources are never balanced. This is what algae thrives on. Being able to ramp the lights is great for the fish so they are not shocked/stunned by lights suddenly switching on/off. However the transition should only take 1hr at the most.
Also, I think you have the 'cold white' LEDs set as bright as 'Pure' and 'Warm'. Plants don't require as much blue light as they do red. So it's good to have the warm white quite high, however i would reduce the cold as that contains too much blue and can promote algae.
As it stands, in order to balance your current lighting profile, you would also need to ramp a rate of co2 injection throughout the day which I've never heard of anyone doing tbh. If you can keep the light consistent for the biggest part of the photoperiod, I'm certain you'll get better plant growth and less algae issues.
If you do change your lighting profile, I'd advise that you stick with the change for a couple of weeks and check for any improvement before tweaking. Plants are pretty slow to adapt to changes, whereas algae isn't.
