All of them work, however only the blue dot is really LED while the red and green are the small lamp. I found out while I was curious how much current this small indicator consumes. The result was surprised me because the red and the green one took about 40 to 60 milliamps (mA.). The blue one took only 10 mA or less. I took the green and the red each one apart and saw small lamp instead of LED. Moreover all the green I got were hardly to see when turned on.Conclusion :The blue is excellent. It's bright and is really LED.The red is bright as well but not LEDThe green is not good. (Not LED and hard to notice the indicator light on)
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