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New Grower HPS Bulb question

flyinhawaiian

Pakalolo on the down low
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My plants are 18 days old and doing well. I am currently running a metal halide and am curious as to when I should switch to a HPS.
 

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With autos you can run Hps on an 18/6 schedule and be just fine. Run the MH 3-4 weeks and switch.
 
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