Sorry about the herms. I have run a very similar setup to yours, same lights, same nutrients. I got the same vein discolouration as you and it disappeared when I turned down the light intensity. Could also have been temporary nute burn, who knows. Looks like you managed to get over it too.
You switched to dark period during daytime, could the herma be caused by light leaking into your tent during lights out, maybe through your tent’s air intake? Something for you to check at least.
I also think you can cut off some of the lower buds (lollipop), they will not get enough light to develop significantly.
I am running the OG Kush from RQS and will make a grow diary again soon. Hoping no hermies!!
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