The time spent to understand all this and how to recreate it has taken so much time im wanting to ask for help and to consolidate what I have learnt so far and make it easy for others. I have highlighted in red the areas i need help with esp using UVB
Ideally i want to add End of day effect and UVB to the Geekbeast pro light to create the best spectrum and know when to use each additional light, for how long and what height.
Thanks for the help.
Emerson Effect: (increasing photos system 2 to 1 conversion for NADH and ATP)
A combination of 640-680 and 735nm light will produce more vegetative growth than an equal amount of 680 alone or 735 alone.
I have read anywhere between a 2:1 ratio to 3:1 ratio of deep red (660nm): far red (730nm)
I did find a study (need to look for it) that said a closer ratio may be considered even better (1:1)
How much watt or leds of 660nm and 730nm per sq m2?
10 watts of far red for every 8sq m2.
for a 3x3 tent = 9 sq m2 = 12 watt of far red = ~ 15x 660nm leds.
for a 4x8 tent = 32 sq m2 = 40 watt of far red = ~ 51x 660nm leds.
for a 9x5 tent = 45 sq m2 = 56 watt of far red = ~ 72x 660nm leds
For 730nm led amount you would just choose which ratio you will follow (half the amount of 660nm for 2:1 ratio)
Eg. the Geekbeast 630 pro light they have 72x 660nm leds and 24x 730nm leds ( 3:1 ratio)
When to use it:
Not yet 100% when 660+730 should be used in the cycle yet
Height:
Same as the other light spectrum for each stage
End of Day Effect: (switch the plant to sleep in 15mins vs 2 hours to bring on harvesting 5 to 7 days earlier or be able to run 2 hours extra light per day in flowering [14 hour on vs 12 hours on] for increased yield)
730nm -755nm is the off/on switch for putting the plants to sleep 15 minutes after light cycle.
not sure if its one or the other or you can have both...?
730nm needs to be run for 10-15mins alone after all other lights are off at the end of the light cycle.
This means if the 730nm lights cant be turned on separately to the other lights (like in most light bars) you will need a separate light bar
How much watt or leds of 730nm per sq m2?
7 watts of far red for every 8sq m2.
for a 3x3 tent = 9 sq m2 = 8 watt of infa red = 11x 730nm leds.
for a 4x8 tent =32sq m2 = 25 watt of infa red = 32x 730nm leds.
for a 9x5 tent = 45sq m2 = 40 watt of infa red = 51x 730nm leds.
When to use it:
During flowering?
Height:
Same as the other light spectrum for each stage
UV Effect: (creates a natural stress to the plants that activate their gene response [UVR8] to increase protection of their 'sun screen' which means trichomes)
Up to 20-30% increase in trichomes, thc
UVA 385nm will trigger the UVR8 gene response
Now many also use UVB which is in the 200-300nm range, but how much, what height etc?
The absence of UVB does not eliminate THC production, but rather reduces the output. It does, however, limit or stop CBD production as seen in the tests at the University of Maryland
6.16 watts of far red for every 8sq m2.
for a 3x3 tent = 9sq m2 = 7 watt of UV = ~11x UV leds.
for a 4x8 tent = 32sq m2 = 25 watt of UV = ~ 44 UV leds
for a 9x5 tent = 45sq m2 = 35 watt of UV = ~ 51x UV leds
When to use it:
Last 2 to 4 weeks of flower (sativa stains benefit most). 2-4 hours per day, broken into 15mins per hour
Height:
Not sure
Ideally i want to add End of day effect and UVB to the Geekbeast pro light to create the best spectrum and know when to use each additional light, for how long and what height.
Thanks for the help.
Emerson Effect: (increasing photos system 2 to 1 conversion for NADH and ATP)
A combination of 640-680 and 735nm light will produce more vegetative growth than an equal amount of 680 alone or 735 alone.
I have read anywhere between a 2:1 ratio to 3:1 ratio of deep red (660nm): far red (730nm)
I did find a study (need to look for it) that said a closer ratio may be considered even better (1:1)
How much watt or leds of 660nm and 730nm per sq m2?
10 watts of far red for every 8sq m2.
for a 3x3 tent = 9 sq m2 = 12 watt of far red = ~ 15x 660nm leds.
for a 4x8 tent = 32 sq m2 = 40 watt of far red = ~ 51x 660nm leds.
for a 9x5 tent = 45 sq m2 = 56 watt of far red = ~ 72x 660nm leds
For 730nm led amount you would just choose which ratio you will follow (half the amount of 660nm for 2:1 ratio)
Eg. the Geekbeast 630 pro light they have 72x 660nm leds and 24x 730nm leds ( 3:1 ratio)
When to use it:
Not yet 100% when 660+730 should be used in the cycle yet
Height:
Same as the other light spectrum for each stage
End of Day Effect: (switch the plant to sleep in 15mins vs 2 hours to bring on harvesting 5 to 7 days earlier or be able to run 2 hours extra light per day in flowering [14 hour on vs 12 hours on] for increased yield)
730nm -755nm is the off/on switch for putting the plants to sleep 15 minutes after light cycle.
not sure if its one or the other or you can have both...?
730nm needs to be run for 10-15mins alone after all other lights are off at the end of the light cycle.
This means if the 730nm lights cant be turned on separately to the other lights (like in most light bars) you will need a separate light bar
How much watt or leds of 730nm per sq m2?
7 watts of far red for every 8sq m2.
for a 3x3 tent = 9 sq m2 = 8 watt of infa red = 11x 730nm leds.
for a 4x8 tent =32sq m2 = 25 watt of infa red = 32x 730nm leds.
for a 9x5 tent = 45sq m2 = 40 watt of infa red = 51x 730nm leds.
When to use it:
During flowering?
Height:
Same as the other light spectrum for each stage
UV Effect: (creates a natural stress to the plants that activate their gene response [UVR8] to increase protection of their 'sun screen' which means trichomes)
Up to 20-30% increase in trichomes, thc
UVA 385nm will trigger the UVR8 gene response
Now many also use UVB which is in the 200-300nm range, but how much, what height etc?
The absence of UVB does not eliminate THC production, but rather reduces the output. It does, however, limit or stop CBD production as seen in the tests at the University of Maryland
6.16 watts of far red for every 8sq m2.
for a 3x3 tent = 9sq m2 = 7 watt of UV = ~11x UV leds.
for a 4x8 tent = 32sq m2 = 25 watt of UV = ~ 44 UV leds
for a 9x5 tent = 45sq m2 = 35 watt of UV = ~ 51x UV leds
When to use it:
Last 2 to 4 weeks of flower (sativa stains benefit most). 2-4 hours per day, broken into 15mins per hour
Height:
Not sure
Last edited:
I think you might have typed sq m2 instead of sq ft2 in your first post.
