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So what if there's only 24 hours in a day? That's why it's called artificial lighting. You should read your own tagline, you would do well to observe it yourself. I asked for opinions on the subject, not for some smartass that thinks the world is flat to start sounding off.

You like my math skills? I like your thinking skills. A digital timer with 7 on-off cycles can go on and off whenever you want. Still a software engineer after 25 years so I'm pretty sure I can do the math.

3rd option is in motion already, no way to fix this place without sending the electrician to Tahiti.

The problem is actually with the light; it tries to light up if it gets any power at all and the timers all bleed slight amounts, enough for the lights to glow when off. California Lightworks thinks it's not a problem and is solely an issue with the grounding here. And I'll say this building...

I said timers don't work, they let power bleed through because of a grounding issue so the LEDS glow even when turned off.

So what about slight variations in dark times - like 12 hours today, 5 minutes less than that tomorrow, 3 minutes more the next day, etc. The grounding is off in this building so timers don't work with the LEDS - I have to manually turn on and off and I'm in flower week 6.

Interesting, never heard of that.

Red lights? What about it?

Good to know, thank you!

This is my fourth grow in the last year so while not 'new' I'm certainly still learning especially since each strain behaves differently. I'm running an experiment now with all LED to see what happens but everything is already different than it was with HPS. Felt pots have changed the way the...

Ah, ok thanks. That gives me a direction!

Thanks, but doesn't answer my question. I'm wondering about 12 hours of dark and 18 hours of light.

Hi folks - I am wondering if flowering plants would benefit from 18 on 12 off. I am reading only the dark cycle determines the photoperiod but does anyone know for sure? I ask because autoflowering plants are left on 18 hours light all the time - so why can't you do that with normal plants and...