Toaster79
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Exactly. Except that I made a mistake and written 3x instead of 4xCOB.
If you have enough overhead than I would choose CXB over XM-L2. The thing is you have 50W with a single CXB and you need to spread that ammount of light with raising your lights say 1ft where with XM-L2 you have 5W so you don't have to raise them so high for the same spread and coverage. Also with many small light sources the spread is way more even.
This plant for example was grown under 3 XM-L2s ran at 1400mA, which makes about 13W and didn't get burnt or bleached. That top is about an inch away from LEDs.
Basically its all simple math once you get to know what numbers to put in the equation.
About the build and cooling. I'm planning to build a 200W unit with 4xCXB2540 and the aforementioned driver for my 1x1m tent. For cooling ill be using CPU heatsinks. The ones I've got my eyes on are Arctic Freezer 64 LP
You can use any other type of heatsink as long as it's able to cool your light sources. Why I choose this one over any other one? You have ready made mounting holes to mount it on the construction, you have copper base and you get two fans. The Idea is to keep your LEDs at the lowest possible temperature, so you need to pick materials with highest thermal conductivity. But the copper core heatsink is not enough. You need to have the best possivle contact between your LED and heat sink. So let's use thermal paste like Arctic Silver or similar product. Good enogh I'd say. The chinos are using silicone based products which are crap so anything better than that should do. Well not where I'm comming from ;) I say solder those fuckers on the heatsink :D (I have issues, just so you know) But yeah, my current setup is built with thermal glue and is doing just fine so don't go breaking your neck over that.
You can also use large cooling ribs for passive cooling so your setup will be silent and less power consumptive. If let's say using XM-L2 s you can use extruded aluminum heatsinks 2" wide and 1" high to bring down the costs. Pretty much the BML Spydr architecture.
There are manny ways to skin a cat.
Hope I didn't get you even more confused than before :D
Let it shine!
If you have enough overhead than I would choose CXB over XM-L2. The thing is you have 50W with a single CXB and you need to spread that ammount of light with raising your lights say 1ft where with XM-L2 you have 5W so you don't have to raise them so high for the same spread and coverage. Also with many small light sources the spread is way more even.
This plant for example was grown under 3 XM-L2s ran at 1400mA, which makes about 13W and didn't get burnt or bleached. That top is about an inch away from LEDs.
Basically its all simple math once you get to know what numbers to put in the equation.
About the build and cooling. I'm planning to build a 200W unit with 4xCXB2540 and the aforementioned driver for my 1x1m tent. For cooling ill be using CPU heatsinks. The ones I've got my eyes on are Arctic Freezer 64 LP
You can use any other type of heatsink as long as it's able to cool your light sources. Why I choose this one over any other one? You have ready made mounting holes to mount it on the construction, you have copper base and you get two fans. The Idea is to keep your LEDs at the lowest possible temperature, so you need to pick materials with highest thermal conductivity. But the copper core heatsink is not enough. You need to have the best possivle contact between your LED and heat sink. So let's use thermal paste like Arctic Silver or similar product. Good enogh I'd say. The chinos are using silicone based products which are crap so anything better than that should do. Well not where I'm comming from ;) I say solder those fuckers on the heatsink :D (I have issues, just so you know) But yeah, my current setup is built with thermal glue and is doing just fine so don't go breaking your neck over that.
You can also use large cooling ribs for passive cooling so your setup will be silent and less power consumptive. If let's say using XM-L2 s you can use extruded aluminum heatsinks 2" wide and 1" high to bring down the costs. Pretty much the BML Spydr architecture.
There are manny ways to skin a cat.
Hope I didn't get you even more confused than before :D
Let it shine!