Received "test" swtiches from Delta today. What I found is that the LED remains in the circuit after the swtich is turned off. This is correct per the switches wiring diagram. However this is also the cause fo the problem with the quantity and "type" of light used.
When 4 of these PIAA lights are used, and they are turned off, there is an intense amount of power still within the circuit for a few mili-seconds. Once the switch is placed in its' off postion, the "source" power is removed. Therefore the positive energy has to drain back out through the LED diode in reverse polarity.
Applying power to an LED/diode with reversed polarity will blow the LED/diode.
This explains why the switches LEDs work the first time and blow as soon as you turn them off.
I then tested my "working" switches (from a different company) and found that the LED/diode is actually removed from the circuit (not able to detect them with diaode meter & switch in "off" postion) when the switch is in the Off position. This is why these switches continue to work after their first use.
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