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Decent heat pipe tech? What do you mean? Heat pipes simply move the heat a short distance and do it very efficiently, but they are still limited by the heatsink they are attached to.

I agree with probably needing an AC, but a 14k? With active cooled hoods Id bet a small 5k unit would be fine. With open lights, yeah youd need a bigger unit.

If it is removing moisture from the air it is, by definition, dehumidifying... even without lights on, the humidity will drop with an AC chugging away. The thing is, dehumidifiers are AC units that simply run the air back over the heating coils before putting it back into the room. This is so...

Ive always just found peltier chips to be (in general) terrible at this particular application. Plus they are extremely inefficient from the start. I hope it works for ya though.

"Proper dimming"? There are certainly advantages to the B version but the A version can dim just fine... Why anyone would dim below 50% given the efficiency curves of the average driver is beyond me but do what you wish.

For the prices you're looking at I'd almost say just covert a small window ac. Wouldn't be surprised if it was more efficient from a power usage perspective too.

The A version has a built in potentiometer that goes from like 50-112%.

Ive come across a lot of interesting information lately regarding VPD and increased RH being actually quite beneficial to growing. It would also seem that the solution to this problem lies not in lowering RH but rather increasing the amount of airflow in and around the plants. Also, the only...

I can assure you your logic does not hold up for an undersized filter. But you do make a good point on an oversized filter, as long as it doesnt prohibitively tax the fan, which doesnt seem to be a problem here. I guess my only other question would be, how oversized is your filter...

Lol, doesnt the dimmer control the driver??? ;)

Its possible, but is it practical to run 150w and try to passively cool it? Sounds like some sort of active cooling would be necessary at those currents. Bridgelux website has all the data sheets for the Vero 29s. But there are also 3 different versions of the gen 7 Vero remember.

The only thing that concerns me with custom carbon filters is the fact that the fan and filter need to work together. But hopefully it works out. Let us know.

How big is your grow area? 1000w of HID puts off a lot of heat. Your only options are to exhaust the heat from the light faster and thus pull more fresh (cooler) air in or get an A/C. What is the temp of the air your pulling into the grow? As it will be a big factor in whether or not...

He's not using them as heatsinks it would appear. No reason not to build frame out of it.

Your light will be putting out ~2050btu/hr. Roughly 440btu will raise a 55gal res 1*f. So your res will be raised 4.7*f per hour. Probably not enough water for a passive build considering youre going to be raising the temp ~60* over the course of 12hrs. Granted, a relatively small radiator...

You might be further ahead to make 2 separate light rails with 8 COBs each depending on how you plan on setting it up. At least would be easier to manage moving it around and setting it up IMO. Those potential issues might be of no concern to you, but just a thought.

Use this setup, hang it from the four outside corners IMO. Also, whenever Im cutting aluminum or most other things actually, I just use an angle grinder with a metal or diamond blade. Works wonderfully and is cheap.

Sorry I cant answer your first question, but if heat isnt an issue, and youre pulling air from the whole basement for a small grow, I can assure you your air is not getting "stale".

That is the right one. That is a different COB... 36v vs 72v. Also, I have to agree with Cobkits as far as there being next to no reason to pick the 36v version over the 50v version. The 72v is a different story though.

Out of curiosity, how much electricity is your fridge chiller using? The problem is, a mini fridge has about ~150btu/hr cooling capacity. They are also not designed to constantly be run. Id be very curious of the reliability factor of a fridge chiller. If its all you got thats one thing...