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Hey, if any different than just fan/tube, i.e. actual manifold to tubes, please post pics of your heatsink/manifold system. Thanks.

Look into desiccant materials. Bulk clay would probably be a good choice, even silica gel. You could dry it in a oven and reuse.

Just a thought, rh Beads: http://www.heartfeltindustries.com/proddetail.asp?prod=HB_1_60. I used to smoke cigars and bought beads in bulk to make my own humidor humidifiers, they work great. Haven't used for MMJ yet, but thinking seriously about it for the next harvest. It's a moist day here at...

Looks like 2 votes for...

In the meantime, today under HPS. P1 about ready to chop, P2 a little longer:

1 vote for...

Aw jeez, guess I wore y'all out.

Please discuss/argue current wisdom about deep red.

Huh, bizzarre, couldn' t upload the third graph, try again continuing in this post (Please read previous post, this is continuation of same)My Combo 2: 2:1 White to red 1:1 WW:CW 32 XTE WW R3 BIN 3000K 32 XTE CW R5 BIN 6500K 32 XPE-2 RED P3 BIN Hmm, this is graphing with XPE's and...

Life happens, I have been distracted from this for a while, but back at it. Running some different combos in the graphs I still remain confused how much blue is too little or too much in the context of CW, NW. WW. I've been looking at some of the grow threads and seeing good results with Area...

What benefit is there to all this circuit balancing with resistors rather than just running constant current drivers? Then it is just adding up cumulative forward voltage of each string run by each driver.

Thanks, so searching around, other product specs, show W/mºK rather than C :wall:

Are these kinds of "thermal plasters" worth considering? http://www.ebay.com/itm/85g-Thermal-Conductive-Heatsink-Plaster-Viscous-Adhesive-Compound-Glue-Fr-GPU-IC-/121020715335?pt=US_Thermal_Compounds_Supplies&hash=item1c2d659147

Thanks. The "1.2W/mºC" Leaves me notationally and algebraically confused compared to thermal impedence rating in C-in2/W notation.

Theoretically I'd prefer thermal grease and screws to be able to easily remove LEDs if needed, but going with water cooling I can't drill into the heat sink tubes. So that leaves thermal epoxy or adhesive stars. With those choices, trade off seems to be ease of application and easier...

Nice pun. All good questions. Lacking any engineering background, i agree, needs to be built and tested. The pump I have and used for my shoulder cooling cuff is 19w, 225gph. I am quite sure I could get by just fine with much less wattage and flow. Corrosion with aluminum: glycols...

Yes, now we are thinking on the same page. With water cooling, heat sink temp should be running quite low, though depends on the water reservoir volume as well. I may even drop it to 45C. I don't have the engineering smarts to nail this down mathematically, but this seems like a conservative...

Thanks for the reply, Yes, XTE, however, while 90c would be fine if it was measuring junction temp, we are talking about heat sink temp not junction temp per se. If the heat sink temp was 90, junction temps would be would be a disaster, no?

Bump ^^^ Anyone?

Thanks, You already directed me there on... er... some other forum. I'll have 5-6 rails and if I run 5-6 fans that's too much cost, or if I build manifolds, it's about the same amount of work to use less fans compared to water cooling. Using water, parts costs are lower, and LEDs will run...