My homemade 120W LED lamp - feedback wanted!

have been looking in to UVB lights and did a little bit of research, seems like the UV light is harmful for the plant`s and why they also shoot out more trichomes by it, but I also read people that had em in ther panel, and did run em all the time, that is not advisable, as fare as my research brought me, it would only make sense to run a few hrs a day near the end

and yea 1x630 1x660 and 1x6500K could probably work great, most research I did on red vs blue in % for flowering all show that 10-20% blue is more then enough and a higher % in blue only make em yield less and take longer to finish

my first fixture I bought I customized for flowering in mind, it have 8 clusters and each keep 15 LEDs with the following nM

2x6500K
1x455nm (wish I had chosen one more 6500K instead)

and the red`s

1x620
2x630
4x640
4x660
1x700 (wish I had chosen 720nM)

as you can see it keep a majority of Red`s about 80-90% and have done well so fare, should I do it agin I would do it a bit different based on my knowledge's I got now

and if I had to make it myself I would probably make it a bit more simple

maybe
3x6500K
3x2700K

1x720
4x630
4x660

maybe with a switch to turn on the 720 and half the 630/660 in flowering, after the first 2-3 week`s when we talk auto`s, tho running em all from start to finish could also work nicely with auto`s Im sure

that's interesting. My new shadehouse is 'UV protected', this must be good?

Slipon, definitely sounds like 2700k is the new black - along with far red.
Gonna order a 10W (or 2x 5W) far red tomorrow. Found one made by LEDENGIN with a peak in the range 723-745nm.

yea need some white in the mixture to make the plants happy with a full spectrum, and then a lot of red/fare red

and the inferred sound good, most I have read talk about 720-740

one thing I notice is that my old fixture have 700nm in em and my new have 730 and seem`s like my new one make em produce a bit more trichome`s

can I ask you how hard are they to put together ?
would love to make some of my own, specially one for Veg (etc. 8x5W 6500K and 4x5W 2700K)

but I have very little to non experience with electrics (pjækket det meste af EFG jern og metal el linen væk og røg fede nede ved Lyngby sø istedet)
is working as a stainless steel smith so hands is put on right, more the teori part of it I might struggle with, no logic in electric in my world

Slipon said:

yea need some white in the mixture to make the plants happy with a full spectrum, and then a lot of red/fare red

and the inferred sound good, most I have read talk about 720-740

one thing I notice is that my old fixture have 700nm in em and my new have 730 and seem`s like my new one make em produce a bit more trichome`s

can I ask you how hard are they to put together ?
would love to make some of my own, specially one for Veg (etc. 8x5W 6500K and 4x5W 2700K)

but I have very little to non experience with electrics (pjækket det meste af EFG jern og metal el linen væk og røg fede nede ved Lyngby sø istedet)
is working as a stainless steel smith so hands is put on right, more the teori part of it I might struggle with, no logic in electric in my world

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They are very easy to put together - it only requires some basic knowledge.

ok, maybe a winter project for me then, need to look a bit more in to what you use and do a lot of research before I begin to buy any parts

takker

Slipon said:

ok, maybe a winter project for me then, need to look a bit more in to what you use and do a lot of research before I begin to buy any parts

takker

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Sounds like a great plan. Let me know when you start - we can brainstorm together. I have some Chinese contacts, so we can source the parts fairly cheap (cheaper than eBay).

sounds great, I will do a lot of research then, when I have some spare time and feel for it (and remember it ) so I have a more solid understanding on how to put em together and how it works in a few months

also still read up a lot about spectrums aso. wont hurt to have even more knowledge's at the time

and it would also be real easy for me to put some kind of case together at work, maybe just some 1mm stainless steel sheets, laser cut em to fit the LED/plug/fan`s and bend em to make a case for air cooling and keep the parts safe

Slipon said:

sounds great, I will do a lot of research then, when I have some spare time and feel for it (and remember it ) so I have a more solid understanding on how to put em together and how it works in a few months

also still read up a lot about spectrums aso. wont hurt to have even more knowledge's at the time

and it would also be real easy for me to put some kind of case together at work, maybe just some 1mm stainless steel sheets, laser cut em to fit the LED/plug/fan`s and bend em to make a case for air cooling and keep the parts safe

Click to expand...

I have extensive knowledge about electronics and thermal management, but no access to metal work. I might be able to get access to radiometric equipment, so a test of the LED lamp would show exactly what it outputs.

ahhh nice, I have been looking in to a Par light meter to measure Umol as Im curious as hell from nature, have a cheap one to measure Lumens




but I guess that don't show much, other then telling me that my first LED fixture is twice as effective (pics) then my cheaper second fixture with out secondary lenses on em, guess it only mean I have to keep em twice as close but would really like to see for myself at what distance I get the optimal Umol witch should be like +1000 I believe I read the Sun put out like 1100 or so tho I also seen some do great at 700-800, dunno one area I have to look a bit more in to but I have a hard time finding a Par meter for reasonable money in a EU shop

Slipon said:

ahhh nice, I have been looking in to a Par light meter to measure Umol as Im curious as hell from nature, have a cheap one to measure Lumens


but I guess that don't show much, other then telling me that my first LED fixture is twice as effective (pics) then my cheaper second fixture with out secondary lenses on em, guess it only mean I have to keep em twice as close but would really like to see for myself at what distance I get the optimal Umol witch should be like +1000 I believe I read the Sun put out like 1100 or so tho I also seen some do great at 700-800, dunno one area I have to look a bit more in to but I have a hard time finding a Par meter for reasonable money in a EU shop

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The Sun meter you have are most likely nothing else but a photo-resistor - a light dependent resistor. It's ok as an indication, but don't rely on it.

What you describe as 1000+ for the sun, is most likely watt per square meter. On a bright sunny day the solar irradiance can reach about 1300 W/m2 (where we live).
This however, tells us nothing about the µmol for those spectra we are interested in - for that we need spectroradiometry.

yea I know, got it for free once I used a good amount of money in a shop (Budgrow.dk)

and I only use it to see at what distance I like to keep my plants and how the light cover is and aso.

fun, but I know I need sumthing els with the LEDs (worked ok to make sure my plants got +5K foot candles of the 600W HPS) if I want to see how effective they are at different distance

and have been searching, but not ready to use much more then 200$ on one, so hard to find anything the even seem`s like quality