where you order your seeds?
I pick up subs gear locally everything else is attitude
sweet backdrops, contrasts very well with the red and purple. when you put them in the dark do you drop the temps as well? should give it a try, take some before and after pics if you can. they can get color variation when its just 65 degrees out but lower may cause a higher output of resin, at around 50 degrees or less it may cause slower growth although since its going into defensive mode.
ice can stress them a bit but you wanna do that in the last couple days, the dark period is also beneficial for this reason. i wouldnt use it before the 48 hours though. try putting ice behind your fans, you can get a cooler as well and leave it open behind one. this should get it down, hopefully to the 60s since the lights will be off. maybe you could get it lower, but buying all that ice or making it can take a while, maybe get ice packs.
i have a friend who killed his plants by doing this but it was probably much smaller than these, the low temps can cause it to stress and make it droop a little bit. 45 degrees is a little low too, that can cut growth and some nutrients are locked out at those temps if im not mistaken, and thats probably a bitch to pay for your a/c running that low. all im suggesting is cut back on the ice if you can, use room temp water so you dont freak her out too much. it wont kill the plant, but it can make it go dormant if anything, looks like your fine though since these are pretty big.
yes, the defense mechanism of cannabis is resin. its essentially for pests, cold weather that could cause the water weight to freeze, or many other environmental stresses. this cold induces the plant to slow, or as it gets into lower temps it could stop lateral growth, and go into full defensive mode and put out resin, if its cold enough the plant will go dormant and get ready for next season rather than trying to finish now.
