Bulénath
Member
Oahu Grown,
I was reading over the last few posts and noticed you are looking for a light trap for your intake.
These are 2" PVC 90 degree elbows making 180 degrees of PVC under each hole: one with two female ends, and one with a female and male end.
The female ends are better for glueing to the wood. Use some super glue then put some White Caulk around the connection to seal it off completely from any light. With only glue, the light will pass through making it useless.
For my 150w HPS cabinets I went with 1-1/2" PVC for better distribution of fresh air, and for a specific pot/floor layout. With the 1-1/2" PVC you need 4" of clearance. To make it completely light proof, the side-walls and the front should go down to the floor, unlike in my picture. That way, only the back of the cabinet's bottom 4" is exposed, which is almost agaisnt the your bedroom wall, and all the fresh air gets sucked under the back of the cabinet and gets dispersed evenly.
These are all pictures of my Veg cab. I use 2 or 3 (depending on how many plants at once) 19w 6500K cfl's. That four way bulb socket was like $1 at wal mart yeas back. You should be able to find those bulbs at Home De Pot or Longs (sometimes).
Shit, with only 38 watts per square foot I can grow out two mothers and a plastic container with 20+ clones
-or-
6-8 fully vegged plants for a month, in 4-5" square black pots. But when I do that many plants I like to use 3 x 19w CFLs.
Here is something that you should know (thank you Sugabear),
that optimal temperatures and humidity (over all conditions) during the first 2 weeks of a plants life will have much to do with the plants sex.
Here is why (and at the end you will be like oh duh)...
When a plant is in unfavorable conditions it will want to produce pollen (aka male plant semen) to fly away to find a better enviroment. When a plant is in near optimal conditions, it will have a tendecy to produce flowers, in hopes of catching some of that pollen, so that it will seed and drop it's seeds directly in the sweet spot. Though sometimes an established female with drop a few seeds without any noticeable male flowers, this is usually a plants natural defense to ensure the future of its genetics. So sometimes even with female clones, you may find one or two seeds.
Anyway, on with the main subject, Vegging plants like a more blue spectrum (5500-6500K), opposed to flowering plants which like the red spectrums(2500ish I think).
Well the problem is that HID lights like metal halides zap the humidity, and you really want 40-60% humidity for vegging seedlings. This is where the CFLs come into play. They provide a a wide range of spectrums, yet come in wattages low enough to keep humidity high. Shoot for 50% over all ambient Humidity for Veg, Flower, Drying, and Curing. That is about perfect.
Therefor, I also find that ventilation is more important for vegging seedlings, than it is for established fruiting plants to ensure you get a good male/female ratio.
In the pictures provided you will notice a Panasonic Whisperline Fan (70cfm model that is discontinued), that has been removed from its black metal box-casing with a 4" vent hole, and hooked directly to a rectangular vent.
Even though it is much quieter than with the black metal casing, I regret doing so becasue now it is:
A) without a light proof exhaust
B) unable to attach a carbon filter which would prolong the life of the fan by keeping the inner components clean.
A 70 CFM fan in about 2.5 square feet at most....
I was reading over the last few posts and noticed you are looking for a light trap for your intake.
These are 2" PVC 90 degree elbows making 180 degrees of PVC under each hole: one with two female ends, and one with a female and male end.
The female ends are better for glueing to the wood. Use some super glue then put some White Caulk around the connection to seal it off completely from any light. With only glue, the light will pass through making it useless.
For my 150w HPS cabinets I went with 1-1/2" PVC for better distribution of fresh air, and for a specific pot/floor layout. With the 1-1/2" PVC you need 4" of clearance. To make it completely light proof, the side-walls and the front should go down to the floor, unlike in my picture. That way, only the back of the cabinet's bottom 4" is exposed, which is almost agaisnt the your bedroom wall, and all the fresh air gets sucked under the back of the cabinet and gets dispersed evenly.
These are all pictures of my Veg cab. I use 2 or 3 (depending on how many plants at once) 19w 6500K cfl's. That four way bulb socket was like $1 at wal mart yeas back. You should be able to find those bulbs at Home De Pot or Longs (sometimes).
Shit, with only 38 watts per square foot I can grow out two mothers and a plastic container with 20+ clones
-or-
6-8 fully vegged plants for a month, in 4-5" square black pots. But when I do that many plants I like to use 3 x 19w CFLs.
Here is something that you should know (thank you Sugabear),
that optimal temperatures and humidity (over all conditions) during the first 2 weeks of a plants life will have much to do with the plants sex.
Here is why (and at the end you will be like oh duh)...
When a plant is in unfavorable conditions it will want to produce pollen (aka male plant semen) to fly away to find a better enviroment. When a plant is in near optimal conditions, it will have a tendecy to produce flowers, in hopes of catching some of that pollen, so that it will seed and drop it's seeds directly in the sweet spot. Though sometimes an established female with drop a few seeds without any noticeable male flowers, this is usually a plants natural defense to ensure the future of its genetics. So sometimes even with female clones, you may find one or two seeds.
Anyway, on with the main subject, Vegging plants like a more blue spectrum (5500-6500K), opposed to flowering plants which like the red spectrums(2500ish I think).
Well the problem is that HID lights like metal halides zap the humidity, and you really want 40-60% humidity for vegging seedlings. This is where the CFLs come into play. They provide a a wide range of spectrums, yet come in wattages low enough to keep humidity high. Shoot for 50% over all ambient Humidity for Veg, Flower, Drying, and Curing. That is about perfect.
Therefor, I also find that ventilation is more important for vegging seedlings, than it is for established fruiting plants to ensure you get a good male/female ratio.
In the pictures provided you will notice a Panasonic Whisperline Fan (70cfm model that is discontinued), that has been removed from its black metal box-casing with a 4" vent hole, and hooked directly to a rectangular vent.
Even though it is much quieter than with the black metal casing, I regret doing so becasue now it is:
A) without a light proof exhaust
B) unable to attach a carbon filter which would prolong the life of the fan by keeping the inner components clean.
A 70 CFM fan in about 2.5 square feet at most....
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