am I missing anything .. Should I get from here
- Thread starter john0000
- Start date
Airwalker16
Well-Known Member
That's all you can get from him! Unfortunately, he won't look into thermal squares until after Chinese new year but should start selling soon. You might wanna look at cutterelectronics.com too. But he doesn't sell meanwell drivers. He uses another brand names Pairui which seem like they be fine but every growlight on the market and all DIY iv seen use meanwell so I'm hesitant to go with them... if he just had meanwells, his prices are good. Also, 10% discount with CUTANDROLL
ok cool thanks just wanted to make sure before i put in order ..didnt want to have to pay for shipping twice..next descison is heatsink..either gonna go with 42'' or 38'' from heatsinkusa ..both passive ...just if i go with 38'' gonna do 9 in apart and if 42'' gonna do 10
Airwalker16
Well-Known Member
48" on a 5.8 profile can only handle about 4 passively
with the setup there i have 88 heat watts per sink and to run it passively you need to times that by 17 =1496
38'' 5.886 heatsink can handle up to=1531..so if my calculations are right anything 38'' and above could handle those cobs i ordered on that driver..will be making 3 of them each with 4 cobs on it.. just trying to figure out if i want to have them 9 in apart or 10..bc doing so will determine 38'' or 42''
speyfly
Well-Known Member
Heat is not your friend, if you are within 15-20% of maxing out a heat sink either, bigger heat sink or add a fan or two.
the 42 will be around 11.5%..from what growmau5 said on youtube he said the 38'' would work passively fine with 38'' under those conditions .so an extra 4 in should be fine i think ill have fans circulating around in tent ..only question is have the cobs 9in part or 10
Airwalker16
Well-Known Member
Dude you can't run 4 on that driver
explain i just watched growmau5 and he did the math and said you could ..if you can explain how he is wrong elaborate..
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on a 48'' heatsink you can actually run 5 cxb 3590 if my calculations are correct
Airwalker16
Well-Known Member
Dude you can't run 4 on that driver. It's too low on its minimum voltage.
Airwalker16
Well-Known Member
Oh nvm I thought it said 240. A 185-1400 is perfection
Airwalker16
Well-Known Member
Definitely can't run 5 on that driver. 4.1 total.
yes that is right ..on a 240 i think you can run 5 but everyone is sold out or i have to order form bunch of diff sites to get all the stuff i need ..my order is all in ..now the waiting game
Airwalker16
Well-Known Member
Yes
thanks
Airwalker16
Well-Known Member
Just don't go over 15 amps