You are not understanding what you are reading.
Hours of light does not matter, it's 100% about the DLI. 8 hours of light from a 2000w LED is very different than from a 100w LED -- you need to know the PPFD in order to calculate how many hours of light you should be running.
If you can hit the max DLI in 8 hours then you are correct, the rest of the light is wasted. Cannabis can use up to 65 DLI before you need CO2, but even with all of my lights I don't hit that until around the 10.5 hour mark.
You are running a cheap 200w LED, I'd bet you wouldn't hit your max DLI even if you ran a full 12 hours of light.
This entire thread has been confusing.
I had to edit.
this is a quote from
@rkymtnman
12/12 has nothing to do with GLR. it is strictly a veg routine you goddamn moron.
I am obviously missing something on this subject, but I have a question about hours of light.
If you consider different latitudes from San Francisco, San Diego, or Columbia the hours of daylight varies greatly. San Francisco has a maximum of about 14hrs 45min. San Diego has a maximum of 14hrs 16min. Columbia, near the equator, only has a maximum of about 12hrs 23min. In fact in Columbia the least amount of daylight is 11hrs 57min. So the daylight hours only vary slightly. With new led's we can really blast the lights hard. So if you can get your DLI up to the max of 65, as you stated earlier in this thread you could run less than 12/12 in flower and save money and still get maximum yield. Am I understanding that correctly?