Are your clones rooted? I'd go easy, I wasn't thinking too clearly the other morning and moved my two cloners (one of which has light nutes with rooted clones) beneath my 400 hps, about 42" below the bulb. The rooted clones were alright, but those just starting to root in the second cloner wilted bad within 10 hours - fortunately they came back within a few hours of being moved.
Good luck with your grow.