How long would it take for Granddaddy purple clones to grow 3 feet tall

I have questions and need answers I was wondering how long would it take for a Granddaddy clones to get 3 ft. tall while underneath a 600 and 400 watt light system put together? I only had the clones so far for a week but I was just curious when would I see growth from my little clones.....

depending on how rooted and tall they were when you got them, my clones are very little when i recieve them in the small rockwool cubes, with just a weeks worth of rooting. I transplant right into hydroton in my 3gal hydro buckets, and i would say to get 3 feet tall would take 7 or 8 weeks, I usually veg mine for a month on 23/1 lighting to get 16-18inch when i switch to 12/12 under a 1000w switchable Mh/HPS lamp

i vegged my plants for 3 months and they were three feet tall but they weren't clones. clones should be around two months

how tall are they right now? were they rooted when you got them(clone) or unrooted(cutting)?

if you can get them to 1 foot and flip da lights they'll be 3 feet in 2 weeks