Thanks LGHT. I have spoken to a few hydro/light buffs down this end and they said that growing under HPS has only a marginal difference between MH I did much like yourself, raised them on 400 then switched to 1000. So you think that 1000 tuffens them enough, thats great as i lost alot of plants a while back from not hardening properly after a 400. ive also got the room with natural air negative ventilation so they will be semi use to the air.
Thanks for your help mate,
Dave