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With HPS use the hot hand method to set the height. Hold your hand just above the plants with the back of your hand to the light. If it gets uncomfortable hot raise the light. You should water 2 hours after the lights come on not at night.
just did it after adding water and cant really say is it heavy or not, coz pots is heavy by themselfs. but anyway before and after water weight did not change much


my plants getting light 18 hours each day, from 06:00 (6 AM) to 00:00 (12 AM). Am i must water at 08:00 (8 AM) or at 02:00 (2 AM)? i read that you must water your plants 30 minutes before bedtime 
