Just installed a pair of the SUNSPOT 36 EQUINOX DUAL-FUNCTION LED LANDING AND TAXI LIGHT(s) in the cowling of the c180.

Haven't had a chance to try them at night but they are BRIGHT!

They work with reverse polarity so you'll need a DPDT switch, or you can use a cessna style SPDT switch like I did w/ a module. (I used Forward and Reverse Relay Module for Motor/Linear Actuator, Reversing Relay Module found on amazon but a pair of relays will also work)

Now I wait for the Stene Quasar CX tips...

https://www.youtube.com/watch?v=sc24tA-W5QY