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HPS and MH at same time?


New Member
Anyone ever run both at same time with a mix of 600 hps and 400 mh from veg thru bloom? What effect on spacing, yield, etc. does it have?


New Member
I had a similar question, DaMagoMan helped me figure it out, Although my mix was a 250 w HPS and a 400w MH, Basically try it out, I'm using both of them during the vegging stage atm and my plants are growing extremely well, no sign of any unhealthy conditions, I'm very happy with it so far.. But it also could be different depending on different strains..


Well-Known Member
I use both my 430 watt and my 400 watt HPS lights for my whole grow cycle the are always on for what ever light cycle i am using

i also use 2 1000 watt switchable ballast so these are the only MH i use during the veg cycle.

And my grows turn out just fine everytime.


New Member
Thanks for feedback guys! i am def gonna b using a light mover with two of these setups running. 2 400mh and 2 600 hps on a mover for even coverage of a 5 x 9 rectangle. Figure i will try a mix of 2 mh and 1 hps for veg then 2 hps and 1 mh for bloom! See what happens. i will keep u posted. White widow and Blue ice. 12 2 gal pots. 55 gal res. Advanced nutes prob sensi or Iguana. Rockwool on top of clay in each pot. Plenty of fresh air.
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