retarded leaves

Does anybody else get semi-twisted, retarded leaves after switching to HPS??

not that ive seen... sure its not the bloom you switching?

i'm running cutting edge nutes in veg mode and nute recipe. I've just switched from 24 hours of CFL's to 18 hours of HPS and CFL. My ppm's are around 500 and although my plants are plenty big (14") I'm vegging to get a better root mass before flowering. I'm hoping theyre just a little shocked.

Theyre more droopy than retarded/twisted. Just a little off. Theyre not "reaching" for the light. Perhaps I need more roots in the water. I have an NFT tube and I know for sure each of the 4 plants only have a few strands of roots that can actually reach.