how long to levae lights on???? light cycle ???/ magnetic ballist???

8x8nhl

Member
ok so I have a few questions
1. i have 2x250 watt mh with 2x110 watt vho's both 20k mh with one atnic vho and one 13k vho on my 75 gal i was wondring what the light cycle should be with these ... here is what i cam up with
7-9 vho atnic
9-12 both vho's
12-6 110 watt 13k vho and both mh's on
6-9 13k vho on
9-11 atnic on
is that okay???/
and my mh comes with a magnetic ballist.... i heard theese make a humming noise and they cost more to run, is this true ..... how much more will it cost?
 
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