Lighting Switching from LED to HPS slow growth

[fatcalvin]

I recently switched from my mars hydro LED to my 600 HPS. Under the LED the plant was very vigorous and maturing quickly into its flowering form. Once i switched to HPS it seems like it has slowed down in growth and water uptake. Its in a DWC bucket. I was wondering if this is normal? Its the first time ive done a switch so i was wondering if anyone else had this problem? This weekend i plan on putting in a new AC and putting both the LED and HPS on it. Thanks for the help in advance

 

[Dion]

switching light sources is difficult for plants

hps has so mucn infared the leaves have to toughen up before they can think about growing=like hardening off before going outside