Guy at the store had no clue why they flash, I suspect one of them is overly sensitive to the .2 overvolt and cuts in and out.
So I bought a 6 more LED's, made a spotlight and still wasn't happy.
Reflects off the hat, my nose, chin and earlobes are especially bad when you turn your head.
I was pretty happy about using a USB port to power them ( i have a remotely powered USB hub, from 115 v, not connected to the computer at all). Although it does seem to power them fine off the ports in the G15 keyboard that give you a "low power" message when you try to plug any other device into it.
Already had all the soldering stuff out so I took the 3 good LED's out of my original 6, ground the ends down as far as I dared and made em flat and then I mounted them on the hat.
Just popped holes in the fabric(cardboard in the brim) and slid the leads through, soldered em on, then bent the leads to aim them.
Sayal Electronics had some 1 inch adhesive velcro tabs, should hold the wires out of harms way.
Hacked up another USB cable and powered it up.
Works great all the time with a tiny exposure adjustment for ambient lighting.
Bottom line.
This works great with a few cautions.
If your room has greatly variable light go with the LED's on the hat or headset.
If you are in the basement then the reflectors probably work well enough.
Measure your model dimensions and model position carefully and enter them.(under the model tab)