How to judge the positive and negative poles of high power LED
Small power usually use a multimeter diode file test positive and negative, plus positive voltage can be lit, but you say the high power is not necessarily line, may not drive
Build a suitable circuit, power - current limiting resistor -LED, plus positive voltage is bright, negative voltage is not bright
Look at components, the general plastic package inside the electrode size is different, connected to the larger area of the electrode is negative foot; also, the positive pin will generally be more than the negative electrode
Look at the device manual and ask for it from the dealer
