GrowingAbroad
Active Member
Hi guys,
I'm new here and after reading a lot before without posting it's time to get started myself as well.
I'm already growing for a while under HPS and now decided to start using COBS as well on the side.
So the basic thought i have is this.
I usually tend to grow under 1200 watts HPS light which equals around 120.000 effective lumens total taking away the light that gets lost from the reflector and wall.
The plan is to build a 2,5 square meter room using 16 Cree cobs at 36v x 1.4 amps = 804 watts @ 182.5 lumens per watt which should equal around 146.764 lumens at 806 watts. This should give me more Lumens using a lot less power.
There's a few things i still haven't made my mind on which are:
1. Should i only use 3500K cobs or should i mix it up using 3000k and 4000k? I read mixed things so i would like to hear some more opinions about it.
2. Am i correct with the calculations that i made regarding lumens having more grow power with the 800 watts cobs as to 1200 watts HPS?
3. What layout would be best for me to use?
Option 1 -mixed 3000k en 4000k 2 rows of 8
3000 - 4000 - 3000 - 4000 - 3000 - 4000 - 3000 - 4000
.................................................. .............................................. 16 COBS
4000 - 3000 - 4000 - 3000 - 4000 - 3000 - 4000 - 3000
================================================== ===
Option 2 - Only 3500k 2 rows of 8
3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500
.................................................. .............................................. 16 COBS
3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500
================================================== ===
option 3 - mixed 3000k en 4000k 3x5
3000 - 3000 - 3000 - 3000 - 3000 - 3000
.....4000.....................4000...................4000..... .......15 COBS
3000 - 3000 - 3000 - 3000 - 3000 - 3000
================================================== ===
Option 4 - just 3500k cobs 3x5
3500 - 3500 - 3500 - 3500 - 3500 - 3500
.....3500.....................3500...................3500..... ........15 COBS
3500 - 3500 - 3500 - 3500 - 3500 - 3500
I look forward to you're advice and comments on this setup.
Thanks in Advance.
I'm new here and after reading a lot before without posting it's time to get started myself as well.
I'm already growing for a while under HPS and now decided to start using COBS as well on the side.
So the basic thought i have is this.
I usually tend to grow under 1200 watts HPS light which equals around 120.000 effective lumens total taking away the light that gets lost from the reflector and wall.
The plan is to build a 2,5 square meter room using 16 Cree cobs at 36v x 1.4 amps = 804 watts @ 182.5 lumens per watt which should equal around 146.764 lumens at 806 watts. This should give me more Lumens using a lot less power.
There's a few things i still haven't made my mind on which are:
1. Should i only use 3500K cobs or should i mix it up using 3000k and 4000k? I read mixed things so i would like to hear some more opinions about it.
2. Am i correct with the calculations that i made regarding lumens having more grow power with the 800 watts cobs as to 1200 watts HPS?
3. What layout would be best for me to use?
Option 1 -mixed 3000k en 4000k 2 rows of 8
3000 - 4000 - 3000 - 4000 - 3000 - 4000 - 3000 - 4000
.................................................. .............................................. 16 COBS
4000 - 3000 - 4000 - 3000 - 4000 - 3000 - 4000 - 3000
================================================== ===
Option 2 - Only 3500k 2 rows of 8
3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500
.................................................. .............................................. 16 COBS
3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500 - 3500
================================================== ===
option 3 - mixed 3000k en 4000k 3x5
3000 - 3000 - 3000 - 3000 - 3000 - 3000
.....4000.....................4000...................4000..... .......15 COBS
3000 - 3000 - 3000 - 3000 - 3000 - 3000
================================================== ===
Option 4 - just 3500k cobs 3x5
3500 - 3500 - 3500 - 3500 - 3500 - 3500
.....3500.....................3500...................3500..... ........15 COBS
3500 - 3500 - 3500 - 3500 - 3500 - 3500
I look forward to you're advice and comments on this setup.
Thanks in Advance.