jjng5
Well-Known Member
Hello all!
SWIM has two flowering tents that are getting finalized for SOG at 2 plants per square foot. One tent is 4.54 ft x 4.54 ft (= approx. 20.5 sq ft total) and the other is 5 ft x 5 ft (= 25 sq ft total). Also each tent has it's own 20 lb CO2 tank with regulator and Saturn controller. These will be sealed tents. SWIM needs to move the foxy ladies soon as they're between 10-12 inches tall now.
To my question... The foot print...
In the smaller flower tent (4.54' x 4.54') there are (2) air-cooled 400W HPS lamps and (2) HLG 324 V2's on a 320watt controller. I tested the LED range with a multimeter and depending upon whether you dim them they range between 150-165 watts each. That totals ~55 watt per sq ft (39 wpsf as HPS and 16 wpsf as LED).
In the larger flower tent (5' x 5') there are (2) air-cooled 600W HPS lamps and (2) HLG 324 V2's on a 320watt controller. That totals ~61 watt per sq ft (48 wpsf as HPS and 13.2 wpsf as LED).
[Measurements taken from a Lux meter with LED's @ 17" height and HPS @ 19" height]
SWIM goal here is maximum efficiency. Of course both tents could run at 150 watt per sq ft but again, the goal is maximum efficiency not necessarily the biggest harvest. Each tent will run around 1000 ppm of CO2 all throughout flower except for the last 2 weeks will taper it down of course.
The issue at the moment is that I'm not sure that the tents have adequate foot prints for SOG. And I need some outside feedback from experienced advanced growers on the subject. Does SWIM really need two more HLG 324 V2's per tent (basically one hanging above each of the four corners with the (2) HPS hanging more in the centers? Or is four light sources enough here for SOG? SWIM doesn't want to have to spend more money on lights and electricity if the gains will be minimal but if it's going to make a huge difference towards significantly improved efficiencies... then I guess SWIM has to break down and do it.
SWIM took some Lux measurements of the smaller 4.54' x 4.54' tent with the (2) HLG 324's and the (2) HPS lamps running. Before I get yelled out, I recognize that Lux does not accurately measure LED lamps I know. But SWIM doesn't want to spend hundreds of dollars on a PAR meter when he knows he has efficient lamps -- SWIM just wants to try and gauge the foot print and even out their spread.
Take a look...
The young ladies getting ready to move to their new home:
The larger flower tent (5x5):
5 foot mother bushes with their bush out! (Yes taller than the water heater!)
I appreciate anyones input on this, especially from any SOG or SCROG growers. I know that most people automatically push for more light. But I'm really trying to consider if this setup is going to provide near peak efficiency (esp. with CO2 injection) or if (2) more HLG LED's per flower tent (4 more total) would make a huge difference or just minimal gains?
Thanks everyone!
SWIM has two flowering tents that are getting finalized for SOG at 2 plants per square foot. One tent is 4.54 ft x 4.54 ft (= approx. 20.5 sq ft total) and the other is 5 ft x 5 ft (= 25 sq ft total). Also each tent has it's own 20 lb CO2 tank with regulator and Saturn controller. These will be sealed tents. SWIM needs to move the foxy ladies soon as they're between 10-12 inches tall now.
To my question... The foot print...
In the smaller flower tent (4.54' x 4.54') there are (2) air-cooled 400W HPS lamps and (2) HLG 324 V2's on a 320watt controller. I tested the LED range with a multimeter and depending upon whether you dim them they range between 150-165 watts each. That totals ~55 watt per sq ft (39 wpsf as HPS and 16 wpsf as LED).
In the larger flower tent (5' x 5') there are (2) air-cooled 600W HPS lamps and (2) HLG 324 V2's on a 320watt controller. That totals ~61 watt per sq ft (48 wpsf as HPS and 13.2 wpsf as LED).
[Measurements taken from a Lux meter with LED's @ 17" height and HPS @ 19" height]
SWIM goal here is maximum efficiency. Of course both tents could run at 150 watt per sq ft but again, the goal is maximum efficiency not necessarily the biggest harvest. Each tent will run around 1000 ppm of CO2 all throughout flower except for the last 2 weeks will taper it down of course.
The issue at the moment is that I'm not sure that the tents have adequate foot prints for SOG. And I need some outside feedback from experienced advanced growers on the subject. Does SWIM really need two more HLG 324 V2's per tent (basically one hanging above each of the four corners with the (2) HPS hanging more in the centers? Or is four light sources enough here for SOG? SWIM doesn't want to have to spend more money on lights and electricity if the gains will be minimal but if it's going to make a huge difference towards significantly improved efficiencies... then I guess SWIM has to break down and do it.
SWIM took some Lux measurements of the smaller 4.54' x 4.54' tent with the (2) HLG 324's and the (2) HPS lamps running. Before I get yelled out, I recognize that Lux does not accurately measure LED lamps I know. But SWIM doesn't want to spend hundreds of dollars on a PAR meter when he knows he has efficient lamps -- SWIM just wants to try and gauge the foot print and even out their spread.
Take a look...
The young ladies getting ready to move to their new home:
The larger flower tent (5x5):
5 foot mother bushes with their bush out! (Yes taller than the water heater!)
I appreciate anyones input on this, especially from any SOG or SCROG growers. I know that most people automatically push for more light. But I'm really trying to consider if this setup is going to provide near peak efficiency (esp. with CO2 injection) or if (2) more HLG LED's per flower tent (4 more total) would make a huge difference or just minimal gains?
Thanks everyone!
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