I am about to put a parts list together for my friend. he is looking to replace a 1000w hps light. i was looking at kits and then at individual parts instead. when it came time to decide which cobs to order, i realized i needed more information. i figured i'd ask if there's a preference when it comes to the cri? I'm not sure if that matters for bud weight in flower. would there be a weight difference between builds, with everything else being equal except the cri and temperature rating (2700k, 3000k, 3500k etc..) of the cobs? would 70 vs 80 vs 90 cri make a difference in weight? plant height? stretch? and which is better for vegging, and which for flowering? also kelvin ratings would be the same in the hypothetical build. so, i guess my question would be which cri and temperature ratings would be ideal for veg and which would be ideal for flowering? or am i really overthinking all this, and it doesn't matter much? thank you in advance for any answers!