PetFlora
Well-Known Member
\It depends on the lens angle. The shallower the angle the hiher from the canopy
Place your hand, or a white envelop, under the light and lower it until you see where the intensity drops off. Keep the canopy above that
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Place your hand, or a white envelop, under the light and lower it until you see where the intensity drops off. Keep the canopy above that
tstick
Well-Known Member
Yeah, at this point, I think you're right. I'm going to get a 2 or 3 bulb splitter, some cord and put my own thing together with some Cree bulbs. I might choose something else later on down the road, but it seems like the best choice at this point. Thanks for the suggestion.
PSUAGRO.
Well-Known Member
Really nothing to lose, ten year warranty and home depot just gives you a new one no questions asked.Yeah, at this point, I think you're right. I'm going to get a 2 or 3 bulb splitter, some cord and put my own thing together with some Cree bulbs. I might choose something else later on down the road, but it seems like the best choice at this point. Thanks for the suggestion.
If you get tired of the cree bulbs our don't like their performance (which I doubt seeing what captain did with them) just use them around the house/apt
I have them for general lighting and they rock......very nice dimming on old switches.
Greengenes707
Well-Known Member
These...
http://www.homedepot.com/p/Cree-60W-Equivalent-Soft-White-2700K-A19-Dimmable-LED-Light-Bulb-BA19-08027OMF-12DE26-2U100/204592770?N=5yc1vZbol
And proof of concept if you didn't find this already...
https://www.rollitup.org/t/flowering-with-cree-bulbs.656542/
GreenThumbsMcgee
Well-Known Member
looks like we are in the same boat. I was asking just about the same questions as you at the same time..i should had just read yr posts. lol. so these Cree style work pretty good you guys?? better then the cfl's? I assume they are quite a bit cooler running, and less wattage....any more advantages?Yeah, at this point, I think you're right. I'm going to get a 2 or 3 bulb splitter, some cord and put my own thing together with some Cree bulbs. I might choose something else later on down the road, but it seems like the best choice at this point. Thanks for the suggestion.
klashnekoffsmoker
Active Member
i am setting up 72 plants I was going to use x6 600w but I thought if I used led I would save on electric and it would pay for its self and also would be better for the heat as i live in the uk! what kind of led's would i have to use to replace my 6 600s and get the same results?? and also could i use a smaller fan with the leds?
GreenThumbsMcgee
Well-Known Member
hey thanks a lot...this would be WAY cheaper!
Abiqua
Well-Known Member
almost 3x less wattage than a 26w Cfl and putting out almost 3x the umols/ too.
Mr Flux did a graph for me [look his shizz up] on the Cree bulbs, right before RIU's update, but in a private message, that is fawkin gone now....I think?
He was surprised, and close / same as the efficiency as other "mainstream" fixtures per math.....
[[[[[[[The blue....which I found is actually 423X-K and not 5000k like they advertised, any one else caught this?
I almost think you could run the 5k's as veg/flower by themselves......
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Abiqua
Well-Known Member
Abiqua
Well-Known Member
Found it
Yes I have seen that capt. Morgan is doing very well. I have checked out the bulbs you mentioned and the Cree ones are actually pretty good. I have not been following bulbs lately so thanks for bringing it up. Hope you start messing around with some soldering though, you can find really cheap LEDs on ebay, that's how I started and it's alway been great fun.
Here is the graph comparing the bulbs:
Here are the numbers:
Code:Philips A19 Power in : 10.97 W (123.00V x 0.09A) Luminous flux : 817 lumen Efficacy : 74 lumen/W LER : 322 lumen/W Radiometric eff.: 23.1% Radiant flux : 2.54 W Rel.quantum eff.: 86.3% (McCree 1972 RQE data) Photon flux : 12.42 umol/s (1.13 umol/J, RQE adjusted 0.98 umol/J) 420-480 nm blue : 10.1% power, 7.9% photons 620-680 nm red : 24.6% power, 27.4% photons Lux to photons : 65.8 lux:umol/m2/s Cree Globe 2700K Power in : 9.60 W (123.00V x 0.08A) Luminous flux : 849 lumen Efficacy : 88 lumen/W LER : 325 lumen/W Radiometric eff.: 27.2% Radiant flux : 2.61 W Rel.quantum eff.: 87.1% (McCree 1972 RQE data) Photon flux : 12.90 umol/s (1.34 umol/J, RQE adjusted 1.17 umol/J) 420-480 nm blue : 7.3% power, 5.7% photons 620-680 nm red : 26.3% power, 29.0% photons Lux to photons : 65.8 lux:umol/m2/s Cree Globe 5000K Power in : 9.40 W (122.00V x 0.08A) Luminous flux : 902 lumen Efficacy : 96 lumen/W LER : 333 lumen/W Radiometric eff.: 28.8% Radiant flux : 2.71 W Rel.quantum eff.: 84.3% (McCree 1972 RQE data) Photon flux : 12.69 umol/s (1.35 umol/J, RQE adjusted 1.14 umol/J) 420-480 nm blue : 17.1% power, 13.9% photons 620-680 nm red : 16.6% power, 19.3% photons Lux to photons : 71.1 lux:umol/m2/s
nolem1234
Active Member
Hey Folks,
A local lighting store has a variety of LEDs on sale. Both bulb and flood types. They have these ones for $25 each which seems to be about the best price anywhere;
LINK
I'm new to growing in general and currently am using CFLs, but am worried about heat problems later in the summer as it warms up around here.
So I'm thinking about making a flowering light panel using 4-5 of these. The grow space is a 2x2.5ft cabinet with about 3ft of vertical space work with above the 2 plant DWC container. Here are a couple questions.
1. Lets say I have 4 of these mounted in there, they would be putting out 3,600 lumens at 2700K color temp. Is 3,600 lumens adequate for 2 plants? They have some 3000K ones as well, so I could mix and match for more spectrum?
2. Anybody have a guesstimate of how fay away I'll need to keep the lights from the canopy? I'm concerned that I'll reach my cabinet ceiling too quickly with LEDs vs CFLs since I can keep those 3-6 inches away. I'm referring to the right room in the picture.
Thanks to all you knowledgable and experienced people in advance.
A local lighting store has a variety of LEDs on sale. Both bulb and flood types. They have these ones for $25 each which seems to be about the best price anywhere;
LINK
I'm new to growing in general and currently am using CFLs, but am worried about heat problems later in the summer as it warms up around here.
So I'm thinking about making a flowering light panel using 4-5 of these. The grow space is a 2x2.5ft cabinet with about 3ft of vertical space work with above the 2 plant DWC container. Here are a couple questions.
1. Lets say I have 4 of these mounted in there, they would be putting out 3,600 lumens at 2700K color temp. Is 3,600 lumens adequate for 2 plants? They have some 3000K ones as well, so I could mix and match for more spectrum?
2. Anybody have a guesstimate of how fay away I'll need to keep the lights from the canopy? I'm concerned that I'll reach my cabinet ceiling too quickly with LEDs vs CFLs since I can keep those 3-6 inches away. I'm referring to the right room in the picture.
Thanks to all you knowledgable and experienced people in advance.
PSUAGRO.
Well-Known Member
I would stick with the cree 9w 2700k bulbs from homed depot for flower, 5000k for veg/clone and-or add ins for flower===more light never hurts if you can cool it .................run them the same as your cfl's, very close. buy as many as you can afford. If heat becomes a problem just remove some bulbs......easy peasyHey Folks,
A local lighting store has a variety of LEDs on sale. Both bulb and flood types. They have these ones for $25 each which seems to be about the best price anywhere;
LINK
I'm new to growing in general and currently am using CFLs, but am worried about heat problems later in the summer as it warms up around here.
So I'm thinking about making a flowering light panel using 4-5 of these. The grow space is a 2x2.5ft cabinet with about 3ft of vertical space work with above the 2 plant DWC container. Here are a couple questions.
1. Lets say I have 4 of these mounted in there, they would be putting out 3,600 lumens at 2700K color temp. Is 3,600 lumens adequate for 2 plants? They have some 3000K ones as well, so I could mix and match for more spectrum?
2. Anybody have a guesstimate of how fay away I'll need to keep the lights from the canopy? I'm concerned that I'll reach my cabinet ceiling too quickly with LEDs vs CFLs since I can keep those 3-6 inches away. I'm referring to the right room in the picture.
Thanks to all you knowledgable and experienced people in advance.
BTW you need to upgrade your "circulation" fans..........those computer fans ain't gonna cut it in the summer.
good luck and be safe
thanks for the awesome mr flux info^^^^ very helpful .............would rep you if I could abiqua.............anyone know if it's possible atm???
CaliWorthington
Well-Known Member
You would need 6 of the larger LED panels, or 10-12 medium ones. The 560-watt Chinese panel I'm trying puts out way less radiant heat than an air-cooled 600w. Eventually they will heat up your room though. I'm guessing you can get away with about half the exhaust fan power, as compared to the 600w.
Unfortunately UPS smashed my panel up, but it still works. I don't like the T5 style hangers though, can't get it high enough. I'll have to try 4 rope ratchets instead. I wonder if the more expensive panels have stronger metalwork? It was packed pretty well too, but not well enough to survive those bastards.
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Abiqua
Well-Known Member
nolem1234
Active Member
Thanks for the info. Yep just finished up installing air inlets in the bottom and outlets on the top of both chambers with duct fans today actually, those PC fans are just to move the leaves.I would stick with the cree 9w 2700k bulbs from homed depot for flower, 5000k for veg/clone and-or add ins for flower===more light never hurts if you can cool it .................run them the same as your cfl's, very close. buy as many as you can afford. If heat becomes a problem just remove some bulbs......easy peasy
BTW you need to upgrade your "circulation" fans..........those computer fans ain't gonna cut it in the summer.
good luck and be safe
thanks for the awesome mr flux info^^^^ very helpful .............would rep you if I could abiqua.............anyone know if it's possible atm???
These flood lights caught my interest because all their light is directed downward, and they are all marked with how wide the light footprint is, which is nice to know. Also like the idea of have less bulb sockets to deal with. Haven't done the math yet but will need to figure out if fewer big bulbs or more small bulbs will get more bang for the buck.
GreenThumbsMcgee
Well-Known Member
so do you have to point these crees a certain angle>? what works best, directing the light from the side, by running them sideways, or shine them directly down, by hanging them verically? I know the expensive led lighting systems have to be angled properly so it made me wonder
Chronikool
Well-Known Member
I just had to link this for the 'Cree bulber'z'
http://www.aliexpress.com/item/Lamp-Holder-Converter-E27-1turn-7-E27-Lamp-holder-Bulb-Adapter-Converter-Splitter-A-variable-multiple/1720325472.html
http://www.aliexpress.com/item/Lamp-Holder-Converter-E27-1turn-7-E27-Lamp-holder-Bulb-Adapter-Converter-Splitter-A-variable-multiple/1720325472.html
FranJan
Well-Known Member
Like GG707 recommended you need to go talk to the CaptainMorgan in his thread, (link below). Actually you should read the whole thing. I'm pretty sure he did some readings of the CREE bulbs and found the latest batch's output to be pretty even all around, but I could be wrong. Best to ask him the questions you're asking. I hang mine horizontally with reflectors btw. Good Luck!
https://www.rollitup.org/t/flowering-with-cree-bulbs.656542/
What, no reflector? I thought you were the "God of Ali"????? Everyone's just slacking around here, I swearI just had to link this for the 'Cree bulber'z'
http://www.aliexpress.com/item/Lamp-Holder-Converter-E27-1turn-7-E27-Lamp-holder-Bulb-Adapter-Converter-Splitter-A-variable-multiple/1720325472.html
. LOL
bicit
Well-Known Member
Just thought I'd let people know, it seems like bridgelux dropped the price on the VERO chips on digikey. About $15 for an '18 and $37 for a '29. It looks like they're adding a 4kK, 90CRI to the '29 line and a bunch of new chips for the '18 line including a 90CRI, 5600K emitter.
So I have a question about attaching COBS to a CPU heatsink. What are the pro's/con's of using a thermal adhesive like arctic alumia vs. Drilling and tapping the heatsink and using a thermal paste like arctic silver?
So I have a question about attaching COBS to a CPU heatsink. What are the pro's/con's of using a thermal adhesive like arctic alumia vs. Drilling and tapping the heatsink and using a thermal paste like arctic silver?
GreenThumbsMcgee
Well-Known Member
shit, just when you think you are posting in the right spot....sorry to blow the thread up, I just had questions, and was being lazy I guess, thanks again tho, I will check that out.
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