Rahz
Well-Known Member
Excellent example of how to do passive with the straight fin sinks.
Pictures of your DIY lights - Post your pics!!!
- Thread starter TimeToBurn
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zep_lover
Well-Known Member
i have to ask why you did not try to get more spread between your lights?ever since i went vertical i love multiple light sources and minimizing larf.Thanks, I'm less worried now lol. The fixture is 173-270watts, running it lowest setting now. Running at 48.42% now thinking I may turn it up a bit. If I run it hard my efficiency goes down to ~44% though and this seems to be working in my space so I may just leave it alone lol.
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kmog33
Well-Known Member
Lol, I burned out a diode and had a few sitting around and wanted to see if the heatsink I had could cool them. Also I'm testing to see if the mixed spectrum benefits increase from having the arrays closer together like the clustered monos. The tent they're in is also only 32" X 32" X 63" so it's honestly more than enough to cover the whole tent. I grew out the plants a little bigger than I should've, but I'm still getting 30k lux to the floor. About 280k at the canopy. The lowest/smallest nug on the plant looks like it's going to be about a gram dried. Quarter sized and pretty dense. I do clean up the bottoms of my plants early in flower.
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bassman999
Well-Known Member
They might be, but I am not sure if there is a way to accurately measure. I use black tape right next to cob on the HS to measure with IR thermometer
kmog33
Well-Known Member
I think a lot of that has to do with how well you keep your sinks cool, because technically the materials used for heatsinks pull all the heat off the cobs and transfer it further into the sink. If heat could build up on the cobs it would kind of defeat the purpose of he heat sink at all yeah?
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skorchem
Well-Known Member
Yeah, if the heatsinks are connected to metal framing then that heat would dissipitate through this aswell, with the design I have in mind it will have a hollow shroud covering the heat sink with a hole ontop with fan connected.
It will draw the cooler ambient air in through the heatsink fin channels which rips up the air cooling it down quicker and finally out through the fan!
It will draw the cooler ambient air in through the heatsink fin channels which rips up the air cooling it down quicker and finally out through the fan!
kmog33
Well-Known Member
I think this has actually been tested already. I recall pushing on heatsinks being better than pulling but I may be wrong. Someone here will know.
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littlejacob
Well-Known Member
Bonjour
Yes pushing is more effective...someone I guess Supra test it!
Same Supra used a piece of tape on the hs to take ir pistol reading!
CU
Yes pushing is more effective...someone I guess Supra test it!
Same Supra used a piece of tape on the hs to take ir pistol reading!
CU
staygreener
Well-Known Member
Vero 18, 3000K, 97 CRI
Masscool heat sink, 3w;60mm fan
Screws hooks for heat sink and fan
Mean well 40w power supply
I could have done better with the LED, but I just wanted a couple of targeted lights on opposite sides of my P150 (90w continuous, blue heavy). I'm slowly graduating to better things.
Masscool heat sink, 3w;60mm fan
Screws hooks for heat sink and fan
Mean well 40w power supply
I could have done better with the LED, but I just wanted a couple of targeted lights on opposite sides of my P150 (90w continuous, blue heavy). I'm slowly graduating to better things.
PSUAGRO.
Well-Known Member
It was @FranJan and @Rasser(later confirmed with his temp probes) , with help from @Eraserhead(who says he doesn't help this community?!
) to come up with a conclusion on which way the fans should run. This was before supra's time, probably could have used his smarts for a quicker outcome..........funny and stubborn bunch,hahttps://www.rollitup.org/t/lighthouse-hydro-is-doing-it-wrong.528201/ Ryan from Ledstar(china) gave a good analogy about a fan blowing on you or out the window, was a good guy, had a nice sense of humor right froggy?
I was wrong back then and I'm wrong allot now===== nothings changed
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kmog33
Well-Known Member
I remember the thread just didn't want to speak 100% when I was too lazy to go back and check lol. Thanks for doing the legwork.It was @FranJan and @Rasser(later confirmed with his temp probes) , with help from @Eraserhead(who says he doesn't help this community?!
https://www.rollitup.org/t/lighthouse-hydro-is-doing-it-wrong.528201/
I was wrong back then and I'm wrong allot now===== nothings changed
A bunch of our best users on here for information are stubborn and funny lol so not super surprising.
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skorchem
Well-Known Member
Im working on the principle that all computers with heatsinks draw heat away from the heatsink with a fan, and then a further fan exhausts out of the case. if you blow through a tube the temperature will be a bit cooler at the other end but if you put fins through it and do the same you will see the fins chop up the breeze and make cooling more effective as this chopping effect cools the air more rapidly.
littlejacob
Well-Known Member
I guess you should try both way...you just have to turn the fans...and judge by yourself wich way is the most effective!
CU
CU
bassman999
Well-Known Member
With the right shroud pulling instead of blowing could be effective I would think
kmog33
Well-Known Member
I think pulling would work better in an enclosure that is mostly sealed, like an air cooled reflector. So that all of the air you're pulling is really being pushed where you want it.
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Abiqua
Well-Known Member
I would noodle around and read up on laminar flow and heatsink design characteristics........imho you are headed in the opposite direction of where you want to go....
If you really wanna get serious, below is some math that will make a simple model to explore......
