plants in veg getting too tall. okay to cut down a bit?

So I'm waiting for my hps light but on the mean time I have my two plants in my cab growning off some cfls. I'm trying to mother these plants (cheese and cherry kush) but there getting to tall for the cab now which is about 5 feet tall. I'm going to get some rooting solution and some rockwool tomorrow so I can take some trimmings but I need to cut thes girls down before they out grow the cab. What's the most I can cut? Lights are as high as they can go and my ladies are a just about there. I waited too long.

LST or FIM, super crop, these are all better options then chopping her a bit. search em up should be easy.

You can always top them just above the second true node. Depending on stalk thickness, it is probably too late to LST or FIM. Supercropping might still work.

You just need to buy yourself one day, hell just get a long twisty tie or some rope and bend them over a bit and tie them down.... ta-da!

i super croped my month in a half old WW mother 8 cuttings ! after i was done there was still alot of plant left but it took about 3 days to recover. you should be ok !