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Ok so here is my latest and greatest. Install this corning 1/2" foam in between the trusses, double stacked, to get R6. Seal the edges with good stuff expansion foam. This will give me the R-5 minimum I need to keep condensation from building on the roof sheathing. Install this R-13 batt...

The Shed turned out great. I only needed a few more 2x4 studs than he had listed in the plans. Now that I'm done with the basic build I give the plans 5 out of 5 stars. If you haven't ever built something like this, this is a good direction to go in. His Youtube videos are good too. It cost me...

I was going off of what the cut sheet for the power supply stated. it states 6.8A typical which i used for my breaker calculation. http://www.meanwell.com/search/LRS-350/LRS-350-spec.pdf I have never worked with Watts before and I was misunderstanding the conversion from DC-AC and vise versa. I...

Thanks for the chart, I see what you are saying now about the angle. I really researched everything I could find and I did look at the possibility of using that setup too with the LED bulbs they make. I came up with my lumen requirements from this calculation...

You derated the LEDs to 50%? Why not derate it to 30% or 20%, heck lets uprate it to 110%, maybe they get a little extra power from all the love I put into my build. Lol. I'm kidding with you. You were vary careful at performing all the math correctly and collecting all the other data, yet...

Give me a week. I'll post a lot of data about the lighting. I'll download an app and get a few readings.

oh damn. I just looked at the specs and it says R5 per inch.

Here is the foam board that has an R5 value. http://www.lowes.com/pd_15348-46086-201549_1z135rz__?productId=3014183&pl=1

I think I am goin with 1/2 foam board that would give me the R-5 that I need. I will seal the outer edges with expanding foam. Then put the R-13 fiberglass insulation over the top of that. As you said, that would give me the R-5 that I need to keep the cooler indoor temp from reaching the...

wire was $100 4 power supplies $160 15 LED rolls $160 Router bit $15 L-channel $5 $440 all together

Excellent explanation. So the heating problems that someone would have would be: 1. Wire size too small for the application causing high resistance which would cause the supply wires to heat up. 2. Applying a higher voltage than what the LED circuit requires. Example: applying 24 volts to a 12...

I see the confusion in my statement. I was mixing up too different things I was trying to say and the example I used is incorrect. I was trying to get across the idea that using a wire that is too small would cause the voltage to drop below the LED circuits operating voltage. Let's say I had...

This is a cool setup. From this website http://www.instructables.com/id/Aquarium-Light-LED-Refit/#step0

Nice build. Thats a big plan

Yes I am. The max draw of each power supply was almost 7 amps. times 2 power supplies is 14 amps and a 20 amp breaker leaves my 20% cushion. I know that most outlets are pushed to the 20 amp limits most of the time, I just wanted to build according to code.

looks like there are only three ways I can do what I want to do and keep this an unvented roof. """

I am guessing that you are talking about the LED bulb replacements for T-8 fluorescent fixtures? There are 2 types that I know of: 1. one you have to remove the ballast from the fixture and wire 120v ac directly to the bulb. This kind has a DC volt power supply built into the bulbs. 2. The other...

I think you have. It's a switch from 120 volt AC to 12 volts DC. Its the same electricity, just in a different form. A little youtube and google research goes a long way. I would only suggest installing something like this if you fully understand how DC voltage works and how the LEDs work. When...

About the Heat The problem I have seen with LEDs getting hot is using a supply voltage that is too low. This happens a lot in automotive applications. If the LED is rated for 12 volts and is only getting 9 volts, it compensates for that low voltage by drawing more amps. If a car electrical...

Excellent idea. I saw another cool idea where a guy mounted the lights in some roof flashing L-channel is hung it from the ceiling on chains.