Do you keep your LED's on 100% from start to finish, or change the strenght?

Severed Tongue

Well-Known Member
I started mimicking the outdoor season a few grows back just to see,

So in veg, 1st 2 weeks from seed, run light at 50% and 16" - Veg is 18 light /6 dark

Then I crank it up to 100% , and raise the light to top of tent for rest of veg and 1st 4 weeks of flowering, then start reducing "light time" by 30 minutes a week starting at the end of 4 weeks.

At 6 weeks, reducing light intensity 10% each week.

By end of week 8 I'm 10 light/ 14 dark and 80%

I've done this last 3 grows out of 8 finished now, and it's shaved almost a month off the grow from seed to smoke.
 

farmingfisherman

Well-Known Member
I'm using a watt meter along with tablet app that measures lux. I then translate that to a ppfd/umol reading using the spectrum that best matches my light. Oldest plant broke threw the soil 15,14 and 12 days ago. All seem pretty happy so far with a 100 watts of light. Slowly bumping up the watts each day or so. Max output is 330 watts which without co2 I'll likely never use all of.

https://www.waveformlighting.com/horticulture/convert-lux-to-ppfd-online-calculator


View attachment 5230352
Update b
 

farmingfisherman

Well-Known Member
I'm using a watt meter along with tablet app that measures lux. I then translate that to a ppfd/umol reading using the spectrum that best matches my light. Oldest plant broke threw the soil 15,14 and 12 days ago. All seem pretty happy so far with a 100 watts of light. Slowly bumping up the watts each day or so. Max output is 330 watts which without co2 I'll likely never use all of.

https://www.waveformlighting.com/horticulture/convert-lux-to-ppfd-online-calculator


View attachment 5230352
3Oish days old. Currently light is running at 165 watts. After reading info here I'll be bumping the watts up. Transplanted over the weekend. PXL_20221208_032531954.jpg
 

PopeyeSpinach

Well-Known Member
I have a roughly 6 foot x 2+ foot area i do SOG in. I have 4 QB 304s that ive never ran 100% , in fact my driver maxes at 333 watts. Right now im towards the end of flower and had to back them down to about 180 watts.

I still dont know how it is im able to flower at such low watts, i guess cuz my four 304s are really more like two 608s being side by side
 
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