303blunt303
Well-Known Member
i have a $280 budget for vegging but cant i use the led for both stages or does it actually matter ?
i need the best and cheapest led light names
- Thread starter 303blunt303
- Start date
squarefodder
Active Member
you need to do some research. the search bar now has a bold outline. Save some more money and do more research not trying to be a jerk but you will thank me later.
PetFlora
Well-Known Member
If you are a small closet grower look at www.ledgrow.eu Seems to be a proven product that fits your budget.
jpockets420
Well-Known Member
You can use this LED for vegging and flowering. You just have to get one strong enough. I was going to link a perfect light for you but it seems they are temporarily out of stock. I'll look around for a bit and see what I can find.
Edit: Here ya go. I shop on ebay all the time for my growing needs too. Besides amazon it is probably the cheapest place to get my supplies. This light says for "flowering" but it has grow spectrum in it too and will work fine for vegg.
http://www.ebay.com/itm/Pro-7-Band-Hydroponic-270w-Hydro-LED-Plant-Grow-Light-Flowering-IR-UV-Not-240w-/221025087190?pt=LH_DefaultDomain_0&hash=item33761f2ed6
7band 270W with 3W chips..can't beat if for the price
Happy growing!
Edit: Here ya go. I shop on ebay all the time for my growing needs too. Besides amazon it is probably the cheapest place to get my supplies. This light says for "flowering" but it has grow spectrum in it too and will work fine for vegg.
http://www.ebay.com/itm/Pro-7-Band-Hydroponic-270w-Hydro-LED-Plant-Grow-Light-Flowering-IR-UV-Not-240w-/221025087190?pt=LH_DefaultDomain_0&hash=item33761f2ed6
7band 270W with 3W chips..can't beat if for the price
Happy growing!
303blunt303
Well-Known Member
good lookin out. this is what i needed
ghettorigger
Member
Ledgrow.eu is a great site. Apollo panels are cheap and work great too.
The panel above is good, I wouldn't get it because it wastes power with those UV and IR diodes. But that isn't a bad price at all
The panel above is good, I wouldn't get it because it wastes power with those UV and IR diodes. But that isn't a bad price at all
Rasser
Active Member
I agree with it's questionable what use the IR at 850nm have.
But UV at 390nm looks like it could have an impact on the growing plant, if one look at this chart from Wikipedia
http://en.wikipedia.org/wiki/Photosynthetically_active_radiation
And if there is any truth to the talk about saturated leaf when using a narrow spectrum LED light
then using a few UV leds to widening the spectrum would make sense.
Not trying to turn this thread into a debate so if you could just tell why you think UV is a waste ?
jubiare
Active Member
for the usable UV you are talking about, we need to wait some time to have them in leds, if the ever will. For now is more of a gimmick ... or crazy expensive .. u can supplement uv with other sources of light.
Regarding the IR, the are useful. If not for anything, they create the emerson effect, basically a combo of reds + IR 740 will give off more efficiency than using the reds only. But as far as I know past 740ish there is no use of IR (THIS IS OPEN TO DEBATE PERHAPS, BUT WE NEED EXPERIMENTATION). The thing is, good warm whites emitters should give of enough IR for having such a synergy, but this is again open to experimentation, some go with the IR emitters route, others with the warm whites ..... I personally don't know what's best, we'll find out. More IR seems to speed up the flowering length cycle, from what some have testimonied on forums. It also seems to give a better rooting start to seedlings, from Hans experimentation.
Anyway sorry f this is not so related to your thread/question
Regarding the IR, the are useful. If not for anything, they create the emerson effect, basically a combo of reds + IR 740 will give off more efficiency than using the reds only. But as far as I know past 740ish there is no use of IR (THIS IS OPEN TO DEBATE PERHAPS, BUT WE NEED EXPERIMENTATION). The thing is, good warm whites emitters should give of enough IR for having such a synergy, but this is again open to experimentation, some go with the IR emitters route, others with the warm whites ..... I personally don't know what's best, we'll find out. More IR seems to speed up the flowering length cycle, from what some have testimonied on forums. It also seems to give a better rooting start to seedlings, from Hans experimentation.
Anyway sorry f this is not so related to your thread/question
Rasser
Active Member
There seems to be UV light at the end of the tunnel.
EDIT: the question is if the production of 350-400nm will be effected by this, witch operate at 265nm - Anyway
Edit2: wiki UV def.
http://news.ncsu.edu/releases/wms-collazo-uv/
Release Date: 05.14.2012
Research Opens Doors To UV Disinfection Using LED Technology
Research from North Carolina State University will allow the development of
energy-efficient LED devices that use ultraviolet (UV) light to kill pathogens
such as bacteria and viruses. The technology has a wide array of applications
ranging from drinking-water treatment to sterilizing surgical tools.
“UV treatment utilizing LEDs would be more cost-effective, energy efficient and
longer lasting,” says Dr. Ramón Collazo, an assistant professor of materials science
and engineering at NC State and lead author of a paper describing the research.
“Our work would also allow for the development of robust and portable water-treatment
technologies for use in developing countries.”
Researchers found that trace carbon atoms in the substrate of
the aluminum nitride semiconductors block key wavelengths of ultraviolet light.
LEDs utilize aluminum nitride (AlN) as a semiconductor, because the material
can handle a lot of power and create light in a wide spectrum of colors, particularly
in the UV range. However, technologies that use AlN LEDs to create UV light have
been severely limited because the substrates that served as the foundation for
these semiconductors absorbed wavelengths of UV light that are crucial to applications
in sterilization and water treatment technologies.
A team of researchers from North Carolina and Japan has developed a solution to the problem.
Using computer simulation, they determined that trace carbon atoms in the crystalline structure
of the AlN substrate were responsible for absorbing most of the relevant UV light. By eliminating
the carbon in the substrate, the team was able to significantly improve the amount of UV light
that can pass through the substrate at the desired wavelengths.
“Once we identified the problem, it was relatively easy and inexpensive to address,”
says Dr. Zlatko Sitar, Kobe Steel Distinguished Professor of Materials Science and
Engineering at NC State and co-author of the paper.
Commercial technologies incorporating this research are currently being developed
by HexaTech Inc., a spin-off company from NC State.
“This is a problem that’s been around for more than 30 years, and we were able
to solve it by integrating advanced computation, materials synthesis and
characterization,” says Dr. Doug Irving, assistant professor of materials science
and engineering at NC State and co-author of the paper. “I think we’ll see more
work in this vein as the Materials Genome Initiative moves forward, and that
this approach will accelerate the development of new materials and related technologies.”
The paper, “On the origin of the 265 nm absorption band in AlN bulk crystals,”
is published online in Applied Physics Letters.
EDIT: the question is if the production of 350-400nm will be effected by this, witch operate at 265nm - Anyway
Edit2: wiki UV def.
- UVA: 380 nm - 320 nm
- UVB: 320 nm - 280 nm
- UVC: 280 nm - 185 nm
http://news.ncsu.edu/releases/wms-collazo-uv/
Release Date: 05.14.2012
Research Opens Doors To UV Disinfection Using LED Technology
Research from North Carolina State University will allow the development of
energy-efficient LED devices that use ultraviolet (UV) light to kill pathogens
such as bacteria and viruses. The technology has a wide array of applications
ranging from drinking-water treatment to sterilizing surgical tools.
“UV treatment utilizing LEDs would be more cost-effective, energy efficient and
longer lasting,” says Dr. Ramón Collazo, an assistant professor of materials science
and engineering at NC State and lead author of a paper describing the research.
“Our work would also allow for the development of robust and portable water-treatment
technologies for use in developing countries.”
Researchers found that trace carbon atoms in the substrate of
the aluminum nitride semiconductors block key wavelengths of ultraviolet light.
LEDs utilize aluminum nitride (AlN) as a semiconductor, because the material
can handle a lot of power and create light in a wide spectrum of colors, particularly
in the UV range. However, technologies that use AlN LEDs to create UV light have
been severely limited because the substrates that served as the foundation for
these semiconductors absorbed wavelengths of UV light that are crucial to applications
in sterilization and water treatment technologies.
A team of researchers from North Carolina and Japan has developed a solution to the problem.
Using computer simulation, they determined that trace carbon atoms in the crystalline structure
of the AlN substrate were responsible for absorbing most of the relevant UV light. By eliminating
the carbon in the substrate, the team was able to significantly improve the amount of UV light
that can pass through the substrate at the desired wavelengths.
“Once we identified the problem, it was relatively easy and inexpensive to address,”
says Dr. Zlatko Sitar, Kobe Steel Distinguished Professor of Materials Science and
Engineering at NC State and co-author of the paper.
Commercial technologies incorporating this research are currently being developed
by HexaTech Inc., a spin-off company from NC State.
“This is a problem that’s been around for more than 30 years, and we were able
to solve it by integrating advanced computation, materials synthesis and
characterization,” says Dr. Doug Irving, assistant professor of materials science
and engineering at NC State and co-author of the paper. “I think we’ll see more
work in this vein as the Materials Genome Initiative moves forward, and that
this approach will accelerate the development of new materials and related technologies.”
The paper, “On the origin of the 265 nm absorption band in AlN bulk crystals,”
is published online in Applied Physics Letters.
Rasser
Active Member
So far I have used my lamp(120w 90Wactual) from start on week 2 and up with no problems, CFL tube from 0-1week.
And my LED light have very few blue leds. And I can't imagine that starting from LED would be a problem.
Adjusting the height of the lamp up and down as the plant grows and not expecting a 4'x4' footprint from a 90 watt ufo is key.
I have 4 plants on 2'x1.5'