I grow 3-5 feet tall plants, I don't cut off the "sucker branches" or anything. I have 0 problem producing buds from top to bottom. Most people think LED's are a joke because of a few reasons.
A. The Shitty Companies
B. Never trying it yourselves but using others (usually straight newbies) as proof positive.
C. Straight up mumbo jumbo people just come up with
Yeah there are good and bad lights for growing, I have a few different companies and I work with those lights to achieve my goals. In my smaller 2x4 tents I use a 100w 200w 100w and the plants are about 1-2 ft tall.
In my bigger area the plants are as big as anything I grew under HPS. Coming from someone who has worked commercially in the cannabis industry I will admit that the spread of LED's isn't as good as HPS. HOWEVER the density, resin content, trichome development are all superior with LEDS in my experience.
Also if I let you borrow a panel to do a veg off you would see how much tighter node spacing is and the root system seems to develop a hell of a lot better. Plants also suck up a lot more magnesium which leads me to believe there is far more photosynthesis involved. HPS lights only produce 10-20% of light that the plant can actually use, the rest is just brightness mixed with heat.
Just my experience, only been doing this for 5 years, learned from people winning cannabis cups and decided that way wasn't the way for me. I like my LEDs and if you like your HPS nothing wrong with it.
Cheers