....And for those of you who have often wondered what is going on when your A2 appears to have three levels (LED, low incan, high incan) depending on how the switch is pushed or on the luck of the draw, here is what is going on: there is some extra resistance in the circuit. (Assuming you have fresh full batteries installed, of course--low batteries will exhibit this low incan mode even if all contacts are clean and everything is in working order) The extra resistance could be due to contact resistance in the LOTC floating contacts or in the battery stack or somewhere else. Or due to a broken spring contact. But somewhere there is extra resistance—just small enough so that the LVR sees enough voltage to allow it to turn on but too much to keep it on. So it turns on and starts to draw high current through the lamp, which causes a larger voltage drop across the switch and contact resistance, which lowers the LVR input voltage, which causes it to turn off; and the same thing happens over and over again. Sometimes you push hard enough, or the position of the floating LOTC contact on the end of the body tube is such that there is a small enough resistance to run the incan in regulation. But other times, there is too much resistance, and you put the LVR into an equivocating state of confusion about whether it should be on or off, resulting in a sort of in-between state, and thus the so-called "low-incan" level. If you remove the switch and simply short circuit the battery stack negative to the body tube, I bet you will find (in these situations) that it works fine. This indicates the need to clean the contacts inside the switch with a soft cotton pipe cleaner, and the butt end of the body of the light with a cloth or paper towel.
