Lighting Question...

i have 2 600w hps lights, i just bought another 600w setup , my idea is to put the new one in the middle and use a metal halide bulb with the other 2 lights mixing both kinds of lights during veg, then when i go into flower just take it out and replace with the hps ... any body tryed this, any feed backs great...thanks all for reading

depends if you have a ballast that can do conversions.

yes well i thought i had one then got home and its the wrong one but im getting the one with the switch, do you think it would be good to do it like that or should i just run all 3 hps??

besides the difference in lumens betweet mh and hps does the blue light do anything for the plants that the hps doesnt ?? or am i better off just running 3 hps lights the whole way threw