6040-F2525 A1 COB: Legit or cheap knockoff?

Like I said, they are cheap, but if they are the same design as the ones I use you can’t expect much, I only paid $2 a piece for them 5 years ago :rofl: but I’ve not had cooling issues with them.

I have 3 of the 5500k ones I’ve been using for years over a shelf in the nursery and not had to replaced them. It surprises me that the water blocks wouldn’t cool them, and maybe the ones picture by the OP do flicker, but they ”look” the same as the ones I got. If they do flicker, that would generate more heat.
 
Hello, I have just read all of your posts or almost. I wanted to get news of the plants and what they are like with your homemade lights. I am starting to grow them and I am hesitating to do so. Thank you.
 
Hello I just read all your posts or almost I wanted to take news of the plants and what it gives with your homemade lights I start the cultivation and I hesitate to make me thank you
 
Yes, it's certain that security is not at its highest and so for you the best on the market at the moment for this manufactured own lamp are the Samsung LM301B
 
ledgardener.com used to have all the info you needed to diy your own led rigs but it's been struck. i'm not sure where you'll find the formulas to determine the drivers to use anymore. there are loads of youtube vids but not many go into how to calculate for different sized rigs.
 
Teleon said:
U can also build a lamp with LM301B ourself...there are a lot of manufacturer that provide some nice strips.
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If you have any site that sells them I want to because I searched on the internet and I only come across Chinese sites that are used to selling counter ways
 
bluter said:
ledgardener.com used to have all the info you needed to diy your own led rigs but it's been struck. i'm not sure where you'll find the formulas to determine the drivers to use anymore. there are loads of youtube vids but not many go into how to calculate for different sized rigs.
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For the calculations it is not a problem I know well the electricity the hardest is to find the right led and not the counter way that would risk to burn
 
Jawbraker said:
For the calculations it is not a problem I know well the electricity the hardest is to find the right led and not the counter way that would risk to burn
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i'm not sure what you are saying. you calculate for the correct driver to avoid the issues you mention.....

edit: i did have the formulas written down somewhere yrs ago. there are two types of drivers and the calc is a bit different. the wiring changes as well. neither was that hard. i haven't built a rig for near a decade. if i find them i'll pm you.

edit: you have to know the draw and the forward voltage of the strips you are planning to use. you can't mix strips, they all have to be exactly the same and balanced.
 
There is this table which is one of the bases in electricity for all to calculate I am just looking for the best leds because but electrical supplier our horticultural led steps, I wonder if it is really necessary that it is horticultural leds or any led can do the job according to the color

IMG_7689.jpeg
 
Jawbraker said:
There is this table which is one of the bases in electricity for all to calculate I am just looking for the best leds because but electrical supplier our horticultural led steps, I wonder if it is really necessary that it is horticultural leds or any led can do the job according to the color
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read up on kelvin. specific leds work in specific spectrum. plants are super picky about kelvin and spectrum.
 
Therefore u need to get some skills for electrician, if u wanna build ur own it's unavoidable!

Meanwell driver are the best in my opinion btw ;)

ps: if u are in europe I just can recommend www.led-tech.de - there u can get a big range of stripes etc with the LM301B - and as @bluter said, u have to look at the forward voltage and max amp for the driver, and that's it. also keep in mind that u should cool them as good as possible, so they take out more light and hold much longer.
 
bluter said:
read up on kelvin. specific leds work in specific spectrum. plants are super picky about kelvin and spectrum.
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I cant say that's just true.... some say u need way different wavelength between grow and flowering....I just add a bit of red light and thats it. Getting 60-80g/Plant since years with that methode, so I dont think thats bad ;)

I always use 3500K LED stripes for growing, and just add some Osram deep red LED's for flowering.
 
Teleon said:
I always use 3500K LED stripes for growing, and just add some Osram deep red LED's for flowering.
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i run a mix of 3000k and 3500k and haven't seen the need for any deeper red. i could use something a little bluer for veg though.
 
Teleon said:
Therefore u need to get some skills for electrician, if u wanna build ur own it's unavoidable!

Meanwell driver are the best in my opinion btw ;)

ps: if u are in europe I just can recommend www.led-tech.de - there u can get a big range of stripes etc with the LM301B - and as @bluter said, u have to look at the forward voltage and max amp for the driver, and that's it. also keep in mind that u should cool them as good as possible, so they take out more light and hold much longer.
Click to expand...

This is what holds me back from doing anything DIY, I'm at the mercy of MarsHydro, SpiderFarmer etc.

I would love to build some 450nm bars to play around with.
 
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