its discussable. of course there's nothing better than veg with HID and flow with HPS but if you (in my case) have lack of space there might be a issue with overheating. HPS are way better because they produce denser photon beams which means that the light will penetrate deeper into the buds, creating denser & compact buds (higher yield) . BUT 11band LED's, have incredible yield while these produce 50% less heat than HPS of =W its like CFL-->LED--> HPS best, while with CFL's you need to focus on distributing even light to all areas of the bud sites, this can be achieved with LTS or SCROG I don't support trimming unless it covers bud sited but with LTS or SCROG you don't have to worry about this, while you just maintain light about inch to the top of the plant which most of you already know. ill be using 200W 65k and 2x 25w 65k for vegg and 200w 27K and 2x 25w 65k for flow per plant (2 plant grow opp) check my set up
https://www.rollitup.org/t/my-stealth-grow-set-up.830777/
still working on the insulation and overall set up before I start the growth
"Trimming" I think its best to start trimming to the end of flowering like 2weeks before chop down, as trimming focus on diverting energy that goes to the leafs, to the top (main colla). I have graduated from AS/A2 biology so no one can teach me about GMO or plant cycles etc...... fan leafs are most important in lifecycle of the plant these are vital plant organs for creating energy. if you trim too many leafs? --> less energy from the light will get absorbed= less energy produced---> lower yields + stubborn growth. But>> BIG>> but>> plants need all the energy to grow strong while at the end of flowering they don't need that much energy as the plant uses stored energy to transform the bud sites to actual buds, while fan leaves still keep on sucking some of the plants energy to grow, expand roots, thicken the stem,,,,,, bla bla bla,,,,,,, to the end you don't need more energy to be created by the plant as much as you need the energy to be redirected to the buds via trimming. I hope you get my point as I tried to be a straight forward as possible
Also try Half trim so you end up with fan leafs that aren't that big but still can create energy for the plant
LEARN
C6H12O6
Surface Area
so while you think big fan leafs might be useless> they will cover 2-3x the S.A as small fan leaf which means there is more area for the photosynthesis to happen >> 2-3x the output as from small leafs