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Well I'm going to be doing a rather small panel and I want to mix/spread the leds evenly with lower wattages. That way I can get a good even spectrum and no hotspots. In the LED efficiency spreadsheet thread it shows that a vero10 or cree cxb1304 will be about 40% efficient and put out 6 watts...

So do you want higher amperages and lower voltages or a balance?

Yes, this I know. When I look at drivers for leds they seem to come in only predesignated amperages (.35, .5, .7, 1.2) are those the only options out there then you just vary the voltage or something? The led spreadsheet thread shows everything in relation to amperage so I'm just trying to get...

How can amperage and voltage be manipulated to increase/decrease led efficiency? Do they have to be moved up/down in tandem? Is one a function of the other?

What cree tool? I googled it and only found something for full lamps. Boo! Fine isn't what you should aim for.

There is a thread around here where someone cut a piece of mesh to the size of a computer fan added 1'' walls of cardboard, filled it with activated carbon and put another piece of mesh oh the other side. It's essentially a filter the exact size/shape of the fan stacked on top of the fan...I...

Why not smaller watt cob? Is there any efficiency difference one way or the other? http://www.digikey.com/product-detail/en/CXB1304-0000-000C0HC227G/CXB1304-0000-000C0HC227G-ND/5124945 Also why 5k? From the graphs 4k looks like it provides the exact same amount of blue and more of higher...

Have no idea what that means, don't you just use a smaller driver if you want to undervolt?

Talking about smaller cobs vs larger ones in regards to efficiency.

Was genuinely curious, wasn't trying to poke holes in your argument. On the cost/benefit though, it's kind of assuming you are forgoing hours of work. Some people have abundance of time, or genuinely enjoy doing new things, so it's not exactly a 1-1 to their hourly wage sort of deal. An...

I don't really intend on scaling up. What I was planning on doing was getting some 5ish watt leds so I could mix it up a bit, put a few 2700's, a few 6000's along with my 4000k's. Maybe like: 15 watts of 4k 10 watts of 2700k 10 watts of 6k I believe the smaller cxb crees or vero 10's are in...

Are larger LEDS really not more efficient? It seems to be implied that they are, but maybe I'm just misunderstanding something.

Lots of factors to consider here... What's 'better' might be just what works best for you. You have to consider the cost of 2 bulbs vs the cost of a single, better bulb. The ease of use of 1 bulb vs switching back and forth. The spectrum comparisons between them(graphs). Either way-> MH into...

Learning about LEDS as I go. http://www.cree.com/led-components-and-modules/products/xlamp/arrays-nondirectional/xlamp-cxa2530 Their cree page only lists the maximum wattage (65w) but now I know that at lower voltages LEDS are more efficient and at lower voltages they draw less wattage. Right...

Should put a real carbon filter on and let me know how it works.

Your explanation was much more concise though, really helped understand it. :D Although I still have no clue what all those abbreviations mean.

How do color temps affect the plant? Blue = Makes plants more stout red = Bud development White 2700k = ? White 3000k = ? White 4000k = ? White 5000k = ?

Could someone add in an explanation to what these numbers mean? :( It looks like lumens per watt is higher at lower volts, but per PAR is cheaper at higher volts? Do LEDS operate more efficiently at lower or higher voltages?

What mixes would you recommend? (e.g. 30% 2700k, 30% 5000k,30% 4000k, 5%blue, 5%red)

Could you phrase for me in a newbie friendly way anything you learned? Gonna start a super micro soon, curious what spectrums I should be using and I'm curious what strength bulbs I should be using. I.e. A bunch of 2-5 watters or single 20-50 watter. (For efficiency) (smaller watts also allows...