Review on 300% Brighter AutoOne BA15S 7506 1003 1141 P21W Brilliant Red LED Brake Light Bulbs - Pack Of 2, Perfect Replacement Bulbs For Tail Lights by Joe Taniguchi

I bought these bulbs because they were advertised as non-polarity plug and play, which means that unlike regular polarized LED bulbs, (which only work for normal negative ground) they incorporate a bridge circuit so that they should work in either a negative or a positive ground system. Nope. When I stuck it in my car the bulb did not light. When I reversed the polarity to test them (not in the car, but on the workbench), they lit up fine. The item description is WRONG. These bulbs are normal polarized LED bulbs. These bulbs do work fine, and will work for MOST cars, but NOT for many antique british roadsters or other positive ground applications.