Sweet! More sour diesel?
2 Likes
Yeah, I can’t lie: Sour Diesel is the bomb!
White Widow and Gold Leaf. I’ll probably drop a GSC-X next month for outside.
4 Likes
You inspire me to drop my ILGM SD. @Myfriendis410 but I can’t YET! Argh!
2 Likes
I’m gonna drop a part number here for you guys following along that may be looking to do a small light cheaply, and let me know what you guys think. They’re new, so other than nobody is stocking them yet lol…
CXM-9-30-90-18-AC30-F4-3
2 Likes
You got nothing bro? Lol
What about this one?
CXM-9-27-90-18-AC30-F4-3
2 Likes
I search them but I’m not good at this… No images for those two, good price 
2 Likes
Ya, $2.51 each isn’t bad at all! That’s part of it, the biggest thing for the price is the 18v nominal voltage.
Granted, they’re like 12ish watt cobs at test current. But at 18v you can fit twice as many per driver as 36v cobs. And at that price it would seem very conducive to do so. Couple that with high cri offerings in 2700k and 3000k, you get a kick ass light spectrum too.
You’re probably not going to build a 4x4 light with these. But if you have a small space, or you’re just wanting to tinker with a small light cheaply, these seem like an excellent opportunity to do a low cost diy. I have a bucket full of recycled heatsinks that I could probably get away with these passively. When I button up my other projects, I’ll spend $10 to give a few a try.
3 Likes
So let’s say I want to get those for a 3x3 space, how many I need and what else I need besides those… I want to build something and I’m planning to use aluminum plates @dbrn32
I have 2 pieces of aluminum pipes (filled inside, I don’t know how translate this 
), 2 inch diameter 3 feet long, I’m planning to cut them in half but I don’t know if will be suitable to use them as heat sinks. Tomorrow I will put a picture with what I have
1 Like
Let me do some looking.
1 Like
At first glance trying to keep it affordable, an lpc-150-700 will run up to 12 of them. You’d probably need two of those setups for a 3x3. So two drivers and 24 cobs. Plus the usual construction materials. Heatsink, thermal paste, wire, plug, connectors.
If you had a decent chunk of heatsink that you didn’t have to buy could be really cheap. To do half of a 3x3 you’d be looking at $30 in cobs and a $31 driver. Prices us without shipping of course.
2 Likes
Thx… I also edited my previous post.
Now the big (stupid) question :
I saw different temperature colors like 2700k,3000k,4000k… What is best for veg stage and what is best for flowering stage? Or is something good for both? @dbrn32
I didn’t actually look it up yet. @dbrn32 at work today. Lunchtime. I’ll look into it. I always get excited when you leave mysterious part numbers…
2 Likes
Hmmm, I wonder if those would run on some of my aluminum…would really want one for veg.
1 Like
3000k is pretty good all around. 2700k would probably be limited to flower only, not a lot of blue. 4000k or higher good for veg.
2 Likes
Probably decent if you didn’t over do them. They’re not quite as efficient as the mid power diodes, and they don’t have the big pcb to help disperse the heat. So it would be more of an issue per watt than the strips.
1 Like
The Vero29 4000 K actually have a very nice spectrum: Plenty of both blue and red. But they are hard to find. I don’t know what the spectrum of these COBs look like. They could be 4000 K and have more yellow than red. (And we don’t like yellow.)
You could build a super-cheap DIY driver for 9 of the 18 volt COBs using LM317s and no transformer. I think the driver would be 94% efficient. If anybody is interested, I’ll figure out the parts and circuit. I just need to know the current you want to run. Or currents for a two-setting driver. Just requires another resistor and a switch.
It’s way to much for my level of knowledge and the risk is to high (I guess)… Is better for me to play safe
But I really appreciate your offer…
I saw your thread about diy drivers
Yep, just for people comfortable with soldering parts together. Should have mentioned that…
1 Like
I have some vero 18’s, and they’re also good for the money. These are a little smaller, but still 1/4 the price. They’re even cheaper than the vero 10, which would be a more similar comparison.
Personally, I wouldn’t spend the money on these to veg. In @Myfriendis410’s case, took me a little bit of thinking about it. It’s a more difficult build, and lower efficacy that the strips he’s already familiar working with. On a watt for watt comparison, the strips are as good or better at 4000k. And for a veg light, there’s not really any benefit at all moving to the higher cri lower color temp.
1 Like
So you say that strips are better than this? Let me show you what I have in mind… Just need to find it
This are from that website you give it to me
@dbrn32
2 Likes