I use 600 W bulbs philips Son-tplus, they have a lumen output of 90 000 lum. maybe a little higher. I use cool shade reflector so ofcourse i have the bulb very close to the tops. Around 15-20 cm on average.
Now, i have read that for every feet, 28.5 cm the lumen output is reduced by 50 %. Thus on this bulb if i where to have them at 28.5 cm the lumen woudl be 45 000 lummen loss
How is the lumen reduced is it static or exp? if statictly reduced , the lumen loss per cm would be 1578 or 4010 lumen loss per inch.
I use 3 600 what bulbs over an area of 2m2.
So that would give me a total of 270 000 lum to begin with. So given that i have my lamps at 15 cm from tops, that would mean that i get 66330 lum per bulb an total of 198990 lum over my area and 99495 lum per square meter. That for me seem very high .
So my first question is : Is lumen reduced staticly? and if so, is there any roof for how high lumen intensity i should have?
I use the DPS aero 2m2 system from GH. Over that table i have 3 coolshades 600 W. i grow clones, directly from propagation to bloom, that is 24-0 to 12/12. no veg.
I also read that this bulbs have 130 lm/W. l
lumen per watt or luminous flux to radiant flux.
And that is where i get a bit confused, beacuse i have hard alot a talk abut wattage and crop , 1 gram per watt etc.
When i read about lumen i got the impression that radiant flux is the import<nt thing. Since it meaasure the amount of power in the light that is emited from the source? And watt refers to the amount of energy that are required to run the lamp is it not?. and since the plants are bound by the amount of ligth they get, not electric power should not Lm/W be what relfect to size of the crop ? since watt does not in any way refer to the amount of light being produced?
So if this is true then how is the lm/w or radiant flux affected by distance
I understand that i dont have to little light in my room, i am however a little concerned that i use more than the plants can absorb?, the first 3-4 days i always keeep the lamps 60 cm from top in order to avoid light burn. vein em off
Now, i have read that for every feet, 28.5 cm the lumen output is reduced by 50 %. Thus on this bulb if i where to have them at 28.5 cm the lumen woudl be 45 000 lummen loss
How is the lumen reduced is it static or exp? if statictly reduced , the lumen loss per cm would be 1578 or 4010 lumen loss per inch.
I use 3 600 what bulbs over an area of 2m2.
So that would give me a total of 270 000 lum to begin with. So given that i have my lamps at 15 cm from tops, that would mean that i get 66330 lum per bulb an total of 198990 lum over my area and 99495 lum per square meter. That for me seem very high .
So my first question is : Is lumen reduced staticly? and if so, is there any roof for how high lumen intensity i should have?
I use the DPS aero 2m2 system from GH. Over that table i have 3 coolshades 600 W. i grow clones, directly from propagation to bloom, that is 24-0 to 12/12. no veg.
I also read that this bulbs have 130 lm/W. l
lumen per watt or luminous flux to radiant flux.
And that is where i get a bit confused, beacuse i have hard alot a talk abut wattage and crop , 1 gram per watt etc.
When i read about lumen i got the impression that radiant flux is the import<nt thing. Since it meaasure the amount of power in the light that is emited from the source? And watt refers to the amount of energy that are required to run the lamp is it not?. and since the plants are bound by the amount of ligth they get, not electric power should not Lm/W be what relfect to size of the crop ? since watt does not in any way refer to the amount of light being produced?
So if this is true then how is the lm/w or radiant flux affected by distance
I understand that i dont have to little light in my room, i am however a little concerned that i use more than the plants can absorb?, the first 3-4 days i always keeep the lamps 60 cm from top in order to avoid light burn. vein em off
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