Thats different Greg!
My first thought maybe a bad coil or solder connection at the resistor. But both LEDs should light if one does.
The only thing I can think of right now is re-solder that pair and resistor.
Throwing out a few quick ideas...
Would the set not working be yellow, green or blue, while the others are red?
Red lights first. Yellow next, then green, blue and white.
Possibly the pair operating poorly are not reverse connected? That could have some strange effects, but they should still light.
The first thing after resoldering I would try is changing those LEDs and their resistor.
The frequency of these things is very high. I would not expect a 2 color LED to show 2 colors when it is up to full speed. More like both colors at the same time.
I believe faster blades, like short PVC Zub-Woofer style, to generate a much higher voltage. Maybe 4" dia pipe, and 3 at 18" diameter blades. Those really spin fast. Then 2 series LEDs replace each single LED. I'll let you do the metric changes.
I don't think there is enough potential for current flow to operate LEDs in parallel. At least not very well. These motors are better for voltage than amps.
I will keep thinking. Let me know what was wrong.
Big Fun with little parts.
G-
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