Wedding Glue 2021 - SKYLAB

Stretching nicely, but I'm still wondering why all my autos top out at 14-18in max. It's consistent across multiple strains so for this WG I lifted the light in week 4 a couple inches and lowered it from 100 to 90%. I don't want to blame the light, now that I have 400w in a 3x3 and the temps and humidity have been normal as well so I don't know. I just don't see the stretch in mid-to-late veg. My Double Grapes were normal, and I don't expect a bushy indica like CDLC to get super tall but something's off. More nutes sooner? I've had flawless grows with this system but when every strain stops at 14-16" iIt's enough to make me experiment next run with something else (I'm trying amended soil concentrate in 1 pot, and topping with D2E amendments in another when I run two Barney's Farm Runtz in Feb.). If you've got any advice, or information that would help PLEASE leave a comment. I can google my way to predicting and fixing problems that are typical, but I've struggled to find reliable info about this. They're not stunted, just short. You can see my nutrient info here, which was the same for the Double Grape (which would've been perfect if I had another light, and chopped 2 weeks later). Thanks for stopping by and good luck growing!