Since I've only got one veg room, I do my re-vegging under 18/6. (400w MH) Same with my clones and seedlings.
I don't know if it's better or not, but it works for me.

I have recently started up-potting the day of harvest and re-veg.
When setting-up my 3 gallon pots, I line the bottom with no more than 1" of rocks, then a layer of that shade cloth (Shade cloth remnants) cut to size, to cover the rocks, then add the soil and plant. I use the shade cloth so I don't have to spend time picking rocks out of the bottom of the plant, and, so no soil will sift thru the rocks creating a path to the bottom of the pot. (keeps soil and roots from any standing water in the bottom of the pot)

I start 'em flowering in the 3 gallon pots till finished, with a really good final flush about 3 or 4 days before harvest. (letting soil dry out a bit) Then I leave the usual ammounts of foliage for re-veg.
Then I set-up a 5 gallon pot with the rocks and shade cloth, then I add fresh soil.

Once the 5 gal pot is ready, I slide the plant out of the 3 gallon pot, and peel the shade cloth from the bottom of the rootball. (which is full of fine roots, but no tap root gets thru) I tap the rootball lightly to remove a little of the old soil, and transplant into the 5 gal. pot. Quick and easy.
I put it in the 5 gallon pot, and fill with more fresh soil. Then into the veg room they go. As the soil I use is pretty hot, I haven't needed to nute, for the first couple of weeks. Gets the roots looking for nutes in the fresh soil.

Last time doing this, I didn't find a hermie, and am almost bummed about it. Because I have already seen the ladies all the way thru harvest the first time, I know they are a stable strain, and would love to see a stress flower or two for breeding femmed seeds. I do have the option of feeding one of the re-veggies some acetylsalicylic acid, tho. (uncoated aspirin - stresses female plant into sending out nanners...not for beginners)

Wow...Sorry. Didn't mean to write a dissertation. Guess I should have started another thread.