Now that I can see the plants better, definitely let them grow some more. Your light is great, but you won't use its full potential on smallish plants like that, so I'd let 'em grow some more. Might as well maximize the yield you get for the electricity you're gonna be using! I dunno if you sell anything (not really any of my business whether you do or not), but if that's for personal use, you're gonna be set for a long time when those ladies are done.