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But you still need to buy the frames, heatsink, lenses, mounts and all the cobs. The extra drivers are just a fraction of the cost of all the other items you must buy to build a set up at 700 ma. So like I said not that much more in cost to go 1400 ma and dim them down.

And if you are spending all that money to build a 700 ma set up it does not take that much more money to upgrade to 1400 which can them be dimmed to 700 ma if you need to.

I have a friend who wants to use 2 cobs at 1.4A in a small cabinet but he needs them dimmable. He wants the multiple points of light from two cobs but does not need more than two cobs at a time running.

How long will it take to get the new units in to replace to bad ones you have now?

That would be difficult to do since I run bare bulb with the plants run around the lights. I have 35 square feet with two bulbs run vert. That 35 feet allows me to get in and work on my plant as well. But Lets talk about drivers instead of my grow ok.

Not saying that the numbers dont work in your grow room. But for me it takes 35 degree air blown into my lung room at 750 cfm to cool 4k of hps. This will keep my flower rooms right around 80 degrees. So the pay back on running the cobs at higher wattage just is not there in my grow. But I...

That is if cooling cost are not a issue. I cant get heat out of my grow easily so cooling is a road block. Run cooler means more area lite for me.

It should work out fine I have been doing it for about 5 years. Remember you can move the plant up or down if you get to much of one or the other. So say you stretch it out to much just put it up to fill in. Or if you fill in to much put it down on the floor to stretch out some.

Is this three of each or 12 of each 3w led? And how much area do they cover at this rate?

I dont think you should LST for vert. This makes a short bushy plant which will either need to be thinned out a lot or you will get a lot of larf. As a matter of fact topping is not that great to do either. In vert or not. You can shape your plant with light movement. For vert if you have...

If you are running a lot of plants I would not do diesels. They stretch to much and will compete with each other and you will get a bunch of larf. I would recommend a quicker flowering strain that will not be in your grow area long enough to out grow its area. I do not grow small plants so...

If I went with the standard 38 inch heat sink in 5.88 from Heat Sinks USA it would cost me $88.8 with their cheapest shipping. Of course I am hit with state taxes which is $5.03. So for 4 heat sinks from PLC my cost is $73.92 or $14.88 cheaper than Heat Sinks USA. That should more than...

I just ordered 16 of Pacific Light Concepts heat sinks and with shipping my price was $18.48 each. That is with his discount code. That seems like a dang good price to me.

You can get a 140mm by 70mm pin heat sink from Pacific Light Concepts for $16.99 with out his discount code. And it is shipped from California which is likely cheaper. Not to mention it is already tapped for a cree 3590 mount and reflector.