need advice on light movers

Can anyone think of a way to rig up some sort of light mover that will handle about 30kg of weight? (roughly) I spoke to the guys at jupiter 2 and they said their movers were made to handle up to 35kg but carrying 3 lights with built in ballasts would probably burn the motor out. but i thought surely weight is weight no matter what its carrying? I don't really want to buy a unit if it can't handle the job and i can't really afford to buy new ballasts yet either.

This is a photo of the lights i'm trying to move, there's 3 in all.

Any help much appreciated

i found a link to the lights we have, they seem to be only 4kg each so a jupiter 2 should be able to carry these no probs. I've also just realised i've kinda answered my own questions now lol
http://www.greenfinger-hydroponics.co.uk/articledetails.php?ArticleID=835

why dont you rewire the ballasts to be remote? it would save you mucho heat problems too.

Yeah i considered it but the lights aren't mine and if i fuck it up thats the whole flowering process fucked so not worth the risk. plus they don't get very hot so thats not realy a problem, just the weight