More Cobs at the same total wattage, simply put gets better efficiency, better light spread with equals better coverage, better heat spread and you can run the cobs closer to the plants.Curious about the same kind of things im4satori.
I have been eye ballin the Vero29 SE-X kit from cutter.Reason being is how the cobs are more efficient when run at a lower wattage which in turn produces more light.
But i don't know how 23.5 watts per cob would do as i have no experience with them.23.5 watts just seems so low.
it would have approximately 85% more ppfd at all pointswouldn't a 100 watt fixture have a deeper penetration for a larger plant over a 50 watt?
depends on the fixture and which diodes it usesif you run a 400 watt fixture dialed down at 50% power does it throw the same light as running a 200 watt fixture at full power
it will be more efficient but the major con is you are buying capacity you dont needs there any cons to buying a larger fixture and running it dialed down?
well I might run them at say 200 watts when there small ad increase the wattage as they get largerit will be more efficient but the major con is you are buying capacity you dont need
im sorryit would have approximately 85% more ppfd at all points
it means that if you take an LED or cob and push it twice as hard it wont be 200% as bright, only about 185% as bright. the softer you run them the more effiicent they are which is why two cobs at 50W put out more light than a single cob of the same type at 100Wwhat does the above statement mean?
ppfd is just a spot measure of intensity like luxI see the ppfd ratings listed on the lights but I really don't know what that means
lumens are for humans, plants want PAR. ppfd is not unreliable, though as i meantioned the data can be used to exaggerate a fixtures performance. quality lights have efficiency stated in umol/J and is usually a number between 1.4 and 3.0.also Ive read some conflicting info on how these lights are rated (although I didn't fully understand it)
somewhere I read that ppfd was unreliable and that lumens per watt would be more accurate
now that im thinking of itit means that if you take an LED or cob and push it twice as hard it wont be 200% as bright, only about 185% as bright. the softer you run them the more effiicent they are which is why two cobs at 50W put out more light than a single cob of the same type at 100W
ppfd is just a spot measure of intensity like lux
ppf is the overall measure of a fixtures total output and is simialr to lumens
steer away from companies who sell fixtures and advertise ppfd readings without ppf measurement. most are unscrupulous and using spot measurements that are biased to make their lights look brighter than they are
lumens are for humans, plants want PAR. ppfd is not unreliable, though as i meantioned the data can be used to exaggerate a fixtures performance. quality lights have efficiency stated in umol/J and is usually a number between 1.4 and 3.0.
I'm running about 18w each right now. Most all COBs have a minimum drive current/voltage, and they just won't come on below that. The closer you can get to that minimum, the higher your theoretical efficiency will be. However, you reach a point of diminishing returns where parts and labor become much more than your power savings. Finding that balance is the key.Curious about the same kind of things im4satori.
I have been eye ballin the Vero29 SE-X kit from cutter.Reason being is how the cobs are more efficient when run at a lower wattage which in turn produces more light.
But i don't know how 23.5 watts per cob would do as i have no experience with them.23.5 watts just seems so low.
"Old tech" came out today, "new tech" comes out tomorrow. Pretty much the norm in the LED game at this point.how does one distinguish between old tech and new tech?
lmao"Old tech" came out today, "new tech" comes out tomorrow. Pretty much the norm in the LED game at this point.
would that be whats called a quantum board?now that im thinking of it
im not even sure ive even put my hands on an LED lol
ive always avoided even looking at them in the past cuz when I started out the cost was crazy and the tech not as advanced...so to keep myself from spending money on it I just avoided it...lol
http://www.fcopto.com/
when I look at this sight and I look at your avatar im seeing these flat colored disks and the one LEd I did see at the grow store was flat, thin and more like a sheet pan
where as he cob looks different visually...whats the difference?
seems like the whole COB crowd is behind on lighting technology. a large number of small LEDs would give much more uniform coverage and the new 561 strip lights can produce 165LPW and operate without heat sinks at 700ma. all they need is a simple wood frame to hold them and a little soldering to connect them.https://www.digikey.com/products/en?s=55345&v=976 these would work as well as quantum boards at a much lower cost and without heavy heat sinks and frames to hold them they would be a lot lighterim sorry
I am so far behind on the light tech I might as well be a cave man
I been running the old hps style magnestic ballasts for over a decade
just recently a few yrs back upgraded to the DE bulb and electronic ballast and was really happy wit the upgrade
so im going to be very ignorant with some of my questions.......
what does the above statement mean?
I see the ppfd ratings listed on the lights but I really don't know what that means
also Ive read some conflicting info on how these lights are rated (although I didn't fully understand it)
somewhere I read that ppfd was unreliable and that lumens per watt would be more accurate
but since I have no idea what ppfd is I might have completely misunderstood
if its a bit technical to explain maybe a link?