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Works well? Amperage? Likes dislikes or new favs?

In your experience, what will happen in this situation: I run 6 vero 29D on an hlg-240h-c1050A. It fits all 6 veros in series at 36v. 119-238V it says. Makes 37.2W at 1050ma. So when it heats up and the voltage drops, will the light dim because it can't increase the amperage above 1050ma to...

Yeah, I've realized this. I made a diy heat pipe thread. My original intent was bxeb strips on sheet metal. Dirt cheap and high efficiency. The sheet aluminum doubles as a fixture/reflector and heat sink. The cost was like 250$ CAD for 240W at around 170 lm/w then bend a roll of sheet aluminum...

Haven't heard of nichia. Model? Data?

Efficiency and cost

The idea of it is that it's an excellent thermal conductor and achieves super high cooling efficiency with low tech methods. I'd love to invest in 130mm pin fins but I don't wanna dump 240$ to sit at 50-60C when I could be closer to 35-40C. I know it isnt a huge difference. Luminous output was...

How low of amperage do you have to go on Vero 29D before a heat sink isn't needed and I can just use a large mass like a U channel or sheet aluminum? I'm aiming to run at ~1.6a (60w) and 75% of their typical power(79w). If I went down to 40w per cob I'd need to buy different power supplies and...

Freezer, duh!

Hi all, I'm scheming up a liquid cooling system with a rad that is outside. It still gets very cold at night. Will my cobs function properly if the coolant gets super cold at night and they are operating with a Tc of like less than 10 celcius? From the charts I read that the voltage increases...

Bxeb strips are back ordered still and I have their bxrc cobs instead. Also, I have others that are looking to me for help doing the same so I'm aiming for DIY, but reproduceable and soon. I have a car rad but I doubt it'd be economical for me to buy one and a pump that was made for 12v. Best...

I was reading that you want slow flow and high temperature differential

Ya, it looks a lot more effective, cheap and lower wattage. I'm looking at a 140 gpm fountain pump with 1/2" hose, "3 ft push height" (1.5 psi?) for 15$ and cheap amazon water manifolds. I'm having a hard time coming up with a cheap radiator though. This is for 8 cobs, 60w each Do you know of...

Thermal activated shut off inside the fluid line?

Passive is more redundant. If my water pump happens to fail, my lights likely die. I'm tempted to try water and natural convection with a tank, but I have no idea if the flow would be sufficient

You gave me an idea. I could use the diesel line as both the copper tube and fin. I just need to fit a ton of them on to the pop can until it's a small porcupine of sealed 1/4" copper tubes.

I do have old diesel heater line, similar size and all. But I don't think it will work well with a twisty configuration if it doesn't have a wick inside. Also, thinner pipe means more pipes and more joints, soldering etc.

Saw a cool DIY water cooler using the bottom of a pop can as a dome to glue or solder on to a plate. Gives you a small water pocket over your chip. His is for water in and out. Mine will just be a manifold of sorts. His Mine

Ya, maybe larger fins though. Perhaps with holes in them to promote vertical through flow. Im looking at cpu heatsinks and wondering why they want to use multiple thin pipes instead of one large.

I think you're right. I'm going to try making fins out of aluminum flat stock that I have and see how long it takes me.

So I've been reading up on heat pipes, which seem fairly simple to make and are well explained in this video. I noticed that baseboard heaters have a 3/4" copper tube with aluminum fins already on it and people are regularly throwing them out. You just need to buy some copper fittings, try...