All right, finally have time to explain for you how I made the LED strip method work. I was quite satisfied with how much brighter it is than EL wire, but there is a pro/con analysis you have to do before going down this path.
LED vs. EL Pros and Cons:
Pros: -LED is almost 3 to 4 times brighter (but this may vary on the brand or quality or length of EL material).
-LED is noiseless
Cons: -LED requires much more current to drive that brightness
-LED is slightly more bulky
-LED is less user friendly: you need to be good at wiring and soldering to pull it off
So heres what you need to do an LED strip section:
-? feet of flexible LED strip. Glowire.com is a good resource for this stuff, ~$6 a foot. More expensive for waterproof or multicolor. I chose to stay with a fixed color.
-Heat shrink wrap for insulating your soldering points
-Some thin gauge wire to carry the electricity from your battery to the LED strips. I used 22 AWG speaker wire for the connection to the pieces, and 16 AWG wire to carry the main current since the overall current is 100mA for a foot and I had 22 feet of it (2.2A).
-EL wire connectors. These are convenient in that they provide a quick method to connect or disconnect the sections. Coolight.com offers them cheap.
-A soldering iron and solder and a steady hand. And all tools needed to cut, strip and prepare your wiring.
-A 12V power source that has sufficient current capacity for your system. For a basic test of each section an 8AA battery pack will do.
-Some sort of reflective backing material, such as aluminum foil. I used this stuff from hobby lobby, cheap and worked great, quite flexible too:
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-Masking tape, the 1" thick type. And electric tape, black at the minimum.
-Shower curtain
-A hot glue gun
-A sharpie, this is good for indicating the polarity of your wires so you don't hook it up backwards by accident.
Now the pictures attached show how I made the pieces. I give credit to many RPFers for how I did this, but the biggest credit goes to Eddie, how came up with the idea of using shower curtain plus masking tape.
1. The LED strips are able to be cut 3 at a time. There are clear lines that show where to cut. Cut your reflective backing to the size you want, but make it slightly wider so you have room to glue the strip on at an angle. So for a 1" light section, make a 2" total width. Size your LED strips to fit within the matrix.
2. Solder the LED strip wires using the speaker wire. Its best to use heat shrink on each line to strengthen the connection. At this stage put the EL connector on for ease of test and use.
3. Hot glue the LED strips to the backing. Put it at as close to a 45 degree angle as possible, as this will point the light bits toward the backing and create the glow you want, while minimizing the hot spots.
4. Cut your shower curtain pieces to be slightly wider than the piece you just glued, so you can wrap it around the back to tape it together. Put your masking tape strip straight down the middle.
5. Place the shower curtain piece over the LED+backing piece and have it turned on so you can see where light leaks will take place. At this stage, start using the electric tape to form your light pattern. Note that colored electric tape does not block the light sufficiently, you need to layer it. Use a black layer to form the light, and then for this example I put white over it.
6. Optional: mount it using superglue + velcro, or liquid nails it directly to your surface, as needed.
Thats just how to make the sections, now how did we do the siren suit? A major pain in the butt I'll never do again I swear, but glad it worked. To prevent wires running everywhere, we decided to have two layers of suit: an underlayer with a wiring harness, and a suit layer at the top. For this part it was a matter of measuring, soldering and strengthening. This is where I made a battery box to help distribute the current, and something she could wear. I'll leave those details up to you, but it involves cutting holes in the outer dance suit and using anti-fray glue to keep them stable.
Good luck if you go down this path. It requires some technical skill, but its really cool when its all done.