I'm looking for an answer on this as well. I'm having temp drops at night and changing the light cycle to run at night would fix that. What would be the easiest transition to achieve the new light cycle without stressing the grow. Thank you in advance
If you've already started 12/12 I would go with dark not light personally. Turn the lights off when u will want them to shut off. Set ur timer.to kick on 12 Urs after and plug it all back in. The only way to do it in any timely manner is to just do it. If u have time u can do it incrementally adding an hour here taint one there til u hit ur timeframe. I'd just flip it and grow on