For 20 of those LEDs you need about 1 amp hour per hour of operation. So if you want 8 hours of run time you'll need a motorcycle or similar battery.
For those that care thats 0.05 amp per light (via google for similar lights) * 20 lights = 1 amp of load.
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All my copper water pipes are silver soldered so I hope so! That being said there are two types one with lead and one with out, just make sure you use the one with out.
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Im with ForceFed, T12 lights are being phased out so if you install them be prepared to replace them in a few years.
Something like this would probably serve you better...
http://www.homedepot.ca/product/4-ft-t8-4l-32w-grid-shop-light/825098
Dimple dies do two wonderful things for the rigidity of the part.
a) cold working the metal changes the grainstructure adding internal stresses that result in a stiffer part overal. This is the same reason cold rolled steel is "stronger" then hot rolled.
b) by dimpling the metal you are adding a...
+1 for draftsight, very similar to autocad for those that have already learned, free for personal use, and works on pretty much any operating system.
-1 for sketup, coming from catia/solid works sketchup was.. how to say politely.. ****?
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Re: Tips & Tricks
This combined with a digital camera (for taking pictures, not sitting in the closet..) and an area on your work bench for the large parts and you should be good to go.
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I think the way its usually done is by pulling a piece of cloth (think t-shirt material or fleece) over the over the box. The cloth is light enough that the resin will pull it down a bit and make it look a little more natural.
For this to work you will probably need to split the box into two...
I vote disconnect, mostly because I killed my battery by not disconnecting it. I wasn't doing a small amount of body/exhaust work though. I was replacing the back half of a frame...
Be warned, your electrical authority may not accept these replacments even if they are UL listed. Trust me, I just installed a **** load of them and now I have to modify the installation so you can't install florescents in modified fixtures.
I know I wouldn't buy a random used 100A breaker. Saving a couple hundred on a breaker that protects thousands of dollars of gear is a bad decision. So jhelrey is right, put em on ebay, take what you can get.
You may want to call your power company and ask if they will do an unmetered low power drop. I know around here the power company will do drops for other utilities, cable amplifiers to be exact, and they charge for the rated draw. So if the equipment is rated for 5A @ 120V, they would charge you...