I have a Forum x 3 Bog a couple days from chop. The Forum lineage is definitely very light sensitive. I had to raise my lights quite high and dim them more than I do for any other strain. The forum lineage also seems to crave lots of calcium. The trick for that combo, at least for a led soil grower like me, is less intense light to keep things in balance with real warm soil 75-80‘F and 80’F air temp to maximize calcium uptake efficiency. A little tricky to figure out, but that’s what works. I will be starting a Samsquanch x Forum very shortly and plan to use the above strategy on that one as well.
cheers
os