Well done John, great size for a little plastic bucket, little rough round the edges but onwards and upwards! Can't say I recommend that much changing of the light, a very very stressful thing for the plant, I've read it many times in the literature over the years and first hand experience of seeds in bud from doing so. Maybe switxh it one time.mid flower see how that works and the different light schedule will slightly alter the maturation speed of the floral development, if the goal posts are always changing it can be disruptful leading tonalot of jasmonic acid being released.
When a plant encounters excess light past the limiting factor of carbon the plant is forced to use npq, NPQ, or non-photochemical quenching, NPQ is a process that is tightly regulated by and strongly correlated with the Xanthophyll cycle. In order to prevent the damage you must facilitate these process also otherwise the plant takes far more dmg. Very large portion of the plant's oxidative capacity/energy will need to be devoted to survival rather than rapid growth. Not beneficial to go over 40 dli without the carbon and temps to do so otherwise the metabolic pathways are not engaged and plant is forced to use non photochemical quenching.
This is simplified but remains true once carbon reaches 1400ppm and heat is removed as a enzyme denaturing factor, the limiting factor of growth is how well the plant is able to protect itself from ROS and photooxidation. the fundamental physiological limitation is typically RuBP regeneration capacity or the resource limitation is nutrient availability. The plant's ability to provide photoprotection.
In essence, while visible light provides the energy and pH signal for the rapid, dynamic operation of the xanthophyll cycle, UV light exposure influences the long-term capacity for this cycle and other protective mechanisms as part of the plant's acclimation response to a high-stress environment.
How you that information is up to you. Best of luck John.
Not all of us grow with the same purpose or goal, that's OK, keep pushing buddy.