Randomblame
the ones I linked are white spectrum cob's though, not purple lights, and I have no idea what QB's are or which qb light to buy for around 4 plants, I tried asking about these lights but I don't think anyone answered, and idk how to make my self one, I wouldn't even know what parts to buy, the only way I see my self making my own light is if there's a good YouTube video on it. Is not that I want to go the cheap way, I'm trying figure out how to get the best quality for the money and still learning. hps gets way too hot imo
I'm planning to run my new strips at 75% (1050mA) like i did with the 1-footers.Does that sounds ok?
Guess i'll need heatsinks for that?
What would be max to run without heatsinks?
Also, What % would you run the side strips at?
Bridgelux EBgen2 series can run with no heat sinks also at 1050mA because the diodes run pretty low(43,25mA at 700mA and 87,5mA at 1,4A). This means you need only a frame with one crossbar. This way each strip has 3 mounting points(front end, middle & back end) and that's all they need.
This test with and without heat sinks is from less efficient EBgen1 series. You can expect ~5°C less with EBgen2.
@Alien87
You can get them from digikey or arrow. Below is a link. Maybe you need to change the website language; in the case copy the part-number, change language and enter the number in the search engine to find the strips again.
There is also a tool to find all EB strips. Chose Bridgelux and EB series gen2 and the tool shows all the listed EB strips. Digikey has also Samsung strips which are even better and more efficient. The H-influx series for instance but they are more expensive. Q and F-series are also interesting!
DIY means you pay between 0,75 and ±1,5$ per watt depending on degree of efficiency you want to reach. Click the link in my signature to see an example of a more expensive 2$/w version of a DIY strip build. It's actually a strip/COB/Mono + UV combo but completely DIY and I'm neither an electrician nor a metalworker.
This are 3500°k 2footers but you can also get them in 4ft. length (40v driver) or a small as 1ft.(20v driver). 3500°k is a good all in one spectrum and can be use for veg and flowering stage and like the 1 footers they need a 20v driver.
https://www.digikey.de/product-detail/de/bridgelux/BXEB-L0560Z-35E2000-C-B3/976-1734-ND/7907663
EBgen2 are pretty efficient and can grow some dank ass weed. For how-to's visit LEDgardeners website. He explains everything very well so even the dumbest noob can understand it. It's actually pretty easy cuz you need only to plug in a few wires, screw all the part together and bam! It lits up fecken bright!
These strips need a parallel connection and a 20v driver. An HLG-240H-20(A or B, B means dimmable) has 12,5amps so with 12 strips each strip would run with ~1050mA. So you need a 2x 2' frame, 12 EBgen2 strips and an Meanwell HLG-240H-20 to build your own 265w LED light. Maybe 170lm/w or 2,35μMol/J. No heat sinks required!
Strips will stay around 50°C maybe(depends on ambient temps) and you would have a light weight fixture. Such a light would be enough for a 2,5 x 2,5' or a 4 x 2' area and is comparable to 400w HPS.
Here is a link to the Bridgelux strip build tool but you can also find F-series or other strips and how-to's for COB based lights. Actually you can find all you need to know about LED's, LED modules like strips and COB's and all about LED drivers, especially Meanwell.
http://ledgardener.com/tag/bridgelux/
