What distance from plant to sodium light
- Thread starter punarnee
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green_nobody
Well-Known Member
first thing, get the CFL horizontal for optimum light use! second thing to do, get that damn tin foil out, that is no freakin turkey you cookin there!
To the HPS, the distance depends largely on the power of it, if it is well ventilated and got a glass shield in between the bulb and the plants.
since i can't see a fan nor glass shield on your 400W you have to stay at least a more then a foot away from the plants.
good way to determine the needed distance: hold your hand above the plant tops and keep it there for few minutes at that level, if it gets hot you now the distance is to short
(don't use your strong side for this test!)
To the HPS, the distance depends largely on the power of it, if it is well ventilated and got a glass shield in between the bulb and the plants.
since i can't see a fan nor glass shield on your 400W you have to stay at least a more then a foot away from the plants.
good way to determine the needed distance: hold your hand above the plant tops and keep it there for few minutes at that level, if it gets hot you now the distance is to short
(don't use your strong side for this test!)
green_nobody
Well-Known Member
ems blankest, not much better, even glossy white paint would be better then that. get flat white room paint for your box and you are fine
those blankets reflect only about 45-55% of the light back since the are single layered only, you can look thru them really
make cool shades for sure
the crinkles of it will give you heat spots in the grow, burning the plants! so i guess you are roasting a turkey there, i will come for dinner if you want cheap mylar go to a dollar store and search for it in the wrapping section, the sell it as gift wrap but i can ensure you that flat white paint is just fine and less hassle since you have to get the mylar perfectly flat and un-crinkled to the walls which his a damn hassle!
green_nobody
Well-Known Member
that is what he plants to do
he is still with a CFL/envo light veggin that will be a oven and not a grow boxBrokenhope420
Well-Known Member
I read that with tin foil and cfls, hotspots wont present a danger, I have also heard it does; personally I dont think so. A hotspot is a spot that gets hot because of concentrated light. cfls dont produce enough lumens for that to be a problem. I used tin foil, and just kept it very very flat... but I ditched it and im now using layers of white printer paper.
green_nobody
Well-Known Member
it does, even with cfl, and tin foil if crinkled up will concentrates light in spots sufficient enough to do it
and as higher the ratio lum/room-volume gets the worth it will comeyou know, flat white paint is even better then the printer paper, won't mold that fast with high humidity, won't be ripped of by the fan an is more easy to handle do to this. also it reflects better then tin foil, and paper
videoman40
Well-Known Member
With a cabinbet that small, and a 400 watt setup......the last thing on your mind punarnee, should be lost lumens. You don't have any! lol j/k
Circulation and exhaust sould be your main concerns. Yes they are two different things. You are going to have to "control" them plants in that growbox, get out yr coat hangers, and get creative.
I think if you control these 3 things, you'll do pretty good dude.
Peace
Circulation and exhaust sould be your main concerns. Yes they are two different things. You are going to have to "control" them plants in that growbox, get out yr coat hangers, and get creative.
I think if you control these 3 things, you'll do pretty good dude.
Peace
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