The Role of Lighting in Cannabis Cultivation

crimsonecho

crimsonecho

Well-Known Member
Grams per watt is a very deceiving figure. It all really depends on how long you veg for or the techniques you utilize. Monstercropping for example. You may calculate g/kwh. Total weight / Total electricity consumption thru your grow (with fans, air conditioner etc etc.) makes better sense to me.
 
Pa-Nature

Pa-Nature

Well-Known Member
crimsonecho said:
560 watts or so from the wall. An oscilating fan is blowing from above for cooling and to create draft in the room. At the back of the diodes it gets to about 35C which is good i think. Without the fan 45C or so. 18 cxb1830s. 6 per slab. Driven at 700ma.

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if you read that 5-7 was at 3 k first pic anyhow enjoy but at 8 k to replace my lights I can build 3 rooms and equip them FULLY .
 
Pa-Nature

Pa-Nature

Well-Known Member
crimsonecho said:
Grams per watt is a very deceiving figure. It all really depends on how long you veg for or the techniques you utilize. Monstercropping for example. You may calculate g/kwh. Total weight / Total electricity consumption thru your grow (with fans, air conditioner etc etc.) makes better sense to me.
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Yup cost per g is my value .as med grower .
 
crimsonecho

crimsonecho

Well-Known Member
Pa-Nature said:
if you read that 5-7 was at 3 k first pic anyhow enjoy but at 8 k to replace my lights I can build 3 rooms and equip them FULLY .
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Again if you go with prebuilt, plug and play stuff it may cost a lot of money. Diy rules when it comes to leds. At least for now. But still there are long term savings and reducing your carbon footprint is another aspect. But of course to each his own and throwing out already bought, pristine equipment will not actually reduce that said footprint.

I woukd go with leds any day tho.
 
kratos015

kratos015

Well-Known Member
Bookush34 said:
At 5 lbs over 4000watts you are at .67 g/ watt.

If I get my 8 Oz out of the second one drying. It will put me at .72 g/watt.

So they are comparable.
I am hoping to get to 1-1.2lb out of my tent. Eventually.
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Good LED lights are definitely comparable, slightly better than the best HID lights on the market in fact. I've seen journals of people pulling 1.5-2gpw with their LED setups. Then again, Heath Robinson has a journal where he pulled ~3lbs from a single 600w SE HPS vert grow.

It's just a matter of whether that is worth the extra cash, and that is going to vary depending on the grower and their particular circumstances.

My 1000w DE lights up a 5x7 area with ease. I'd have to spend ~$1200 to get enough LEDs to do what a $180 fixture does. The LED has better overall coverage and spectrum, however according to a variety of tests I've seen DE fixtures aren't too far behind.

The reason the DE is inferior to the LEDs is because the DE's spectrum and power diminishes as you move out from the center of the bulb's footprint. A good LED will cover the entire footprint evenly, each diode putting out the same amount of light and spectrum.

It's just a matter of what you're looking for in particular for your own situation. Some people have the money and are glad to spend it. Personally, I can't justify the price and I'm quite happy with my DE knowing full well it is a close second place.

That being said, LEDs prices are coming down quite a bit in the last few years. Eventually they'll be low enough for me to finally grab some, but for now I'm happy with the DE.
 
M

mr. childs

Well-Known Member
kratos015 said:
Good LED lights are definitely comparable, slightly better than the best HID lights on the market in fact. I've seen journals of people pulling 1.5-2gpw with their LED setups. Then again, Heath Robinson has a journal where he pulled ~3lbs from a single 600w SE HPS vert grow.

It's just a matter of whether that is worth the extra cash, and that is going to vary depending on the grower and their particular circumstances.

My 1000w DE lights up a 5x7 area with ease. I'd have to spend ~$1200 to get enough LEDs to do what a $180 fixture does. The LED has better overall coverage and spectrum, however according to a variety of tests I've seen DE fixtures aren't too far behind.

The reason the DE is inferior to the LEDs is because the DE's spectrum and power diminishes as you move out from the center of the bulb's footprint. A good LED will cover the entire footprint evenly, each diode putting out the same amount of light and spectrum.

It's just a matter of what you're looking for in particular for your own situation. Some people have the money and are glad to spend it. Personally, I can't justify the price and I'm quite happy with my DE knowing full well it is a close second place.

That being said, LEDs prices are coming down quite a bit in the last few years. Eventually they'll be low enough for me to finally grab some, but for now I'm happy with the DE.
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which $180 de fixture did you choose? i might stop past an htg & pick up their basic 1k de fixture for a coworker & his wife to start a new hobby.
 
kratos015

kratos015

Well-Known Member
mr. childs said:
which $180 de fixture did you choose? i might stop past an htg & pick up their basic 1k de fixture for a coworker & his wife to start a new hobby.
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https://www.amazon.com/TopoGrow-Fixture-Complete-Ballast-Enclosed/dp/B077VLB2PG/ref=sr_1_1_sspa?keywords=topogrow+double+ended&qid=1552528720&s=gateway&sr=8-1-spons&psc=1

Raised the price a bit it looks like, but this is the one I've been using since Dec 2017. I'm still using the same bulb, you don't have to change DE bulbs all the time like with SE bulbs.

I don't have the equipment to test PAR and all that good stuff, but what I can tell you is that I have definitely noticed a difference in growth, yields, and resin production since switching from SE lights.
 
Pa-Nature

Pa-Nature

Well-Known Member
hmmm im maybe really stoned but
let say 6 lbs 3 k ok ?
Now that is
6 x 448 grams lets round 450 for shits a wiggles
2 lbs 900 gram few wiggles

2700 for 6
thats 300 let go 400 for wiggles off peek 1 gram a watt

300 off 3000 is not 33 percent . and dont care about 400
really stoned .
bongsmilie
 
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