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I have a friend that used Kind soil. He said the same thing you did regarding the roots not going down into it as shown on their website. He says he used it as directed and the roots stopped at the Kind soil. ????

Nope, no crime going on in Michigan. No Heroin epidemic either. Just that dangerous marijuana. I'm glad the police are verifying compliance of these dispensaries. We surely don't need everyone running around with marijuana getting REEFER MADNESS! :bigjoint:

I dig the first three artists. Hank III, not so much. Thanks for sharing.

I agree. SHENANIGANS! I emailed 5-14 for current inventory. Current inventory showed Sunshine Daydream in stock. Mailed my order the same day. It was received by SVOC on Saturday 5-16. They shipped my order on 5-19 but stated that Sunshine Daydream was "Out of Stock" I e-mailed today for...

Abal. When did you place your order for Bodhi and get the 3 free?

Anyone placing an order with Kingbrite? I'm interested in purchasing some CXB3590's but I don't want to pay $60 shipping on 8 COB's. If someone is ordering and would like to split shipping please PM me.

OK, I'll take the bait. Why won't you be ordering from Digi-Key?

Has anyone here ever ordered from KingBrite? Is there any protection through Alibaba? I would be nervous about paying that kind of money without knowing they are good to go.

SupraSPL I noticed that you did not list the 5.375" and I figured it was because of the narrow fin spacing. For the pair of heatsinks I want to use 4 COB's per heatsink, so approximately 400W total. Active cooling would definitely be ALOT cheaper in this application. I was trying to keep it...

I was figuring ambient of 26.1C (79F) with a temperature increase of 8.22C for the 4.6" profile to arrive at 34.7C. I am curious what SupraSPL's ambient temp is for the 28C heatsink recommendation?

If my calculations are correct 4 cxb3590's on 48" of 4.6 serrated would come out to 82cm2 per watt. 48" x 342.88(surface area cm2) = 16,458cm2 / 200w = 82.2. If that profile is not good for passive then the next (passive cooling friendly) profile that would provide 75cm2/W or greater at 48"...

I'm trying to calculate heat sink performance with cxb3590's and I have a couple of questions. First, is the 4.6" serrated a good profile for passive cooling? I've seen mention of wider spacing with short fins for passive so I don't know if that profile would be a poor choice for that...

I just checked those out and they are about $6 cheaper. I am new to all of this electronics stuff so I am trying to learn as much as possible. Seeing that both of these drivers are listed as 94% efficiency, are there advantages other than cost to running the HLG-120H-C700 compared to the...

Thanks for the responses.

What is the formula to determine passive cooling requirements for heatsinks? I want to run 3 cxb3590's per heat sink and would like to stick with passive cooling if I can avoid having 10' or hundred pound heatsinks. Planning to use one HLG-185H-C700 per 3 COB/heatsink.

No Thanks. I guess I should have put a winky face after my post. It was supposed to be a little sarcastic, although I hope that the nonsense ends some day.

I don't know about time to harvest but man those things look nice. Good Job!!

I've been considering giving main lining a try. This picture helped me make up my mind. "LET'S DO THIS" :bigjoint:

I'm not into many Apps but this one is interesting. May have to get it.

On a positive note, if they were getting tax $$$ the dispensary raids and Caregiver arrests would stop.